decred算力計算器
『壹』 （Java）誰有計算器的完整代碼
真是爽阿，兩個要這個代碼的
看看我寫得把，還不錯，樓主給我追加點分吧
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator extends JFrame {
private Container container;
private GridBagLayout layout;
private GridBagConstraints constraints;
private JTextField displayField;//計算結果顯示區
private String lastCommand;//保存+,-,*,/,=命令
private double result;//保存計算結果
private boolean start;//判斷是否為數字的開始
public Calculator() {
super("Calculator");
container=getContentPane();
layout=new GridBagLayout();
container.setLayout(layout);
constraints=new GridBagConstraints();
start=true;
result=0;
lastCommand = "=";
displayField=new JTextField(20);
displayField.setHorizontalAlignment(JTextField.RIGHT);
constraints.gridx=0;
constraints.gridy=0;
constraints.gridwidth=4;
constraints.gridheight=1;
constraints.fill=GridBagConstraints.BOTH;
constraints.weightx=100;
constraints.weighty=100;
layout.setConstraints(displayField,constraints);
container.add(displayField);
ActionListener insert = new InsertAction();
ActionListener command = new CommandAction();
addButton("Backspace",0,1,2,1,insert);
addButton("CE",2,1,1,1,insert);
addButton("C",3,1,1,1,insert);
addButton("7",0,2,1,1,insert);
addButton("8",1,2,1,1,insert);
addButton("9",2,2,1,1,insert);
addButton("/",3,2,1,1,command);
addButton("4",0,3,1,1,insert);
addButton("5",1,3,1,1,insert);
addButton("6",2,3,1,1,insert);
addButton("*",3,3,1,1,command);
addButton("1",0,4,1,1,insert);
addButton("2",1,4,1,1,insert);
addButton("3",2,4,1,1,insert);
addButton("-",3,4,1,1,command);
addButton("0",0,5,1,1,insert);
addButton("+/-",1,5,1,1,insert);//只顯示"-"號,"+"沒有實用價值
addButton(".",2,5,1,1,insert);
addButton("+",3,5,1,1,command);
addButton("=",0,6,4,1,command);
setSize(300,300);
setVisible(true);
}
private void addButton(String label,int row,int column,int with,int height,ActionListener listener) {
JButton button=new JButton(label);
constraints.gridx=row;
constraints.gridy=column;
constraints.gridwidth=with;
constraints.gridheight=height;
constraints.fill=GridBagConstraints.BOTH;
button.addActionListener(listener);
layout.setConstraints(button,constraints);
container.add(button);
}
private class InsertAction implements ActionListener {
public void actionPerformed(ActionEvent event) {
String input=event.getActionCommand();
if (start) {
displayField.setText("");
start=false;
if(input.equals("+/-"))
displayField.setText(displayField.getText()+"-");
}
if(!input.equals("+/-")) {
if(input.equals("Backspace")) {
String str=displayField.getText();
if(str.length()>0)
displayField.setText(str.substring(0,str.length()-1));
}else if(input.equals("CE")||input.equals("C")) {
displayField.setText("0");
start=true;
}else
displayField.setText(displayField.getText()+input);
}
}
}
private class CommandAction implements ActionListener {
public void actionPerformed(ActionEvent evt) {
String command=evt.getActionCommand();
if(start) {
lastCommand=command;
}else {
calculate(Double.parseDouble(displayField.getText()));
lastCommand=command;
start=true;
}
}
}
public void calculate(double x) {
if (lastCommand.equals("+")) result+= x;
else if (lastCommand.equals("-")) result-=x;
else if (lastCommand.equals("*")) result*=x;
else if (lastCommand.equals("/")) result/=x;
else if (lastCommand.equals("=")) result=x;
displayField.setText(""+ result);
}
public static void main(String []args) {
Calculator calculator=new Calculator();
calculator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
『貳』 恐龍有錢算力和dec有什麼用
平台如果開設交易後，dec將成為股份形式，也可以有機會在虛擬平台交易，現在的100dec也許未來能值100萬rbm說不一定，就看平台未來運營的怎樣了
『叄』 用JavaScript做個網頁版的計算器
哎呀！這個簡單！！我給你啦！！！下面就是用Jscript寫的計算器了復制後保存一切就OK的啦！！！！！！！！！
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<!--written by GoldHuman li hai-->
<!--2000.8-->
<title>科學計算器</title>
<style>
<!--
BODY {
font-family: "宋體", "Arial", "Times New Roman";
font-size: 9pt;
background-color: #edf0e1;
color: #0001fC;
background-attachment: fixed;
}
td{font-family: "宋體", "Arial Narrow", "Times New Roman"; font-size:9pt; font-color:#000000}
//-->
</style>
<script language="javascript">
<!--
var endNumber=true
var mem=0
var carry=10
var hexnum="0123456789abcdef"
var angle="d"
var stack=""
var level="0"
var layer=0
//數字鍵
function inputkey(key)
{
var index=key.charCodeAt(0);
if ((carry==2 && (index==48 || index==49))
|| (carry==8 && index>=48 && index<=55)
|| (carry==10 && (index>=48 && index<=57 || index==46))
|| (carry==16 && ((index>=48 && index<=57) || (index>=97 && index<=102))))
if(endNumber)
{
endNumber=false
document.calc.display.value = key
}
else if(document.calc.display.value == null || document.calc.display.value == "0")
document.calc.display.value = key
else
document.calc.display.value += key
}
function changeSign()
{
if (document.calc.display.value!="0")
if(document.calc.display.value.substr(0,1) == "-")
document.calc.display.value = document.calc.display.value.substr(1)
else
document.calc.display.value = "-" + document.calc.display.value
}
//函數鍵
function inputfunction(fun,shiftfun)
{
endNumber=true
if (document.calc.shiftf.checked)
document.calc.display.value=decto(funcalc(shiftfun,(todec(document.calc.display.value,carry))),carry)
else
document.calc.display.value=decto(funcalc(fun,(todec(document.calc.display.value,carry))),carry)
document.calc.shiftf.checked=false
document.calc.hypf.checked=false
inputshift()
}
function inputtrig(trig,arctrig,hyp,archyp)
{
if (document.calc.hypf.checked)
inputfunction(hyp,archyp)
else
inputfunction(trig,arctrig)
}
//運算符
function operation(join,newlevel)
{
endNumber=true
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
while (newlevel!=0 && (newlevel<=(level.charAt(level.length-1))))
{
temp=parse(temp)
level=level.slice(0,-1)
}
if (temp.match(/^(.*\d[\+\-\*\/\%\^\&\|x])?([+-]?[0-9a-f\.]+)$/))
document.calc.display.value=RegExp.$2
stack=stack.substr(0,stack.lastIndexOf("(")+1)+temp+join
document.calc.operator.value=" "+join+" "
level=level+newlevel
}
//括弧
function addbracket()
{
endNumber=true
document.calc.display.value=0
stack=stack+"("
document.calc.operator.value=" "
level=level+0
layer+=1
document.calc.bracket.value="(="+layer
}
function disbracket()
{
endNumber=true
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
while ((level.charAt(level.length-1))>0)
{
temp=parse(temp)
level=level.slice(0,-1)
}
document.calc.display.value=temp
stack=stack.substr(0,stack.lastIndexOf("("))
document.calc.operator.value=" "
level=level.slice(0,-1)
layer-=1
if (layer>0)
document.calc.bracket.value="(="+layer
else
document.calc.bracket.value=""
}
//等號
function result()
{
endNumber=true
while (layer>0)
disbracket()
var temp=stack+document.calc.display.value
while ((level.charAt(level.length-1))>0)
{
temp=parse(temp)
level=level.slice(0,-1)
}
document.calc.display.value=temp
document.calc.bracket.value=""
document.calc.operator.value=""
stack=""
level="0"
}
//修改鍵
function backspace()
{
if (!endNumber)
{
if(document.calc.display.value.length>1)
document.calc.display.value=document.calc.display.value.substring(0,document.calc.display.value.length - 1)
else
document.calc.display.value=0
}
}
function clearall()
{
document.calc.display.value=0
endNumber=true
stack=""
level="0"
layer=""
document.calc.operator.value=""
document.calc.bracket.value=""
}
//轉換鍵
function inputChangCarry(newcarry)
{
endNumber=true
document.calc.display.value=(decto(todec(document.calc.display.value,carry),newcarry))
carry=newcarry
document.calc.sin.disabled=(carry!=10)
document.calc.cos.disabled=(carry!=10)
document.calc.tan.disabled=(carry!=10)
document.calc.bt.disabled=(carry!=10)
document.calc.pi.disabled=(carry!=10)
document.calc.e.disabled=(carry!=10)
document.calc.kp.disabled=(carry!=10)
document.calc.k2.disabled=(carry<=2)
document.calc.k3.disabled=(carry<=2)
document.calc.k4.disabled=(carry<=2)
document.calc.k5.disabled=(carry<=2)
document.calc.k6.disabled=(carry<=2)
document.calc.k7.disabled=(carry<=2)
document.calc.k8.disabled=(carry<=8)
document.calc.k9.disabled=(carry<=8)
document.calc.ka.disabled=(carry<=10)
document.calc.kb.disabled=(carry<=10)
document.calc.kc.disabled=(carry<=10)
document.calc.kd.disabled=(carry<=10)
document.calc.ke.disabled=(carry<=10)
document.calc.kf.disabled=(carry<=10)
}
function inputChangAngle(angletype)
{
endNumber=true
angle=angletype
if (angle=="d")
document.calc.display.value=radiansToDegress(document.calc.display.value)
else
document.calc.display.value=degressToRadians(document.calc.display.value)
endNumber=true
}
function inputshift()
{
if (document.calc.shiftf.checked)
{
document.calc.bt.value="deg "
document.calc.ln.value="exp "
document.calc.log.value="expd"
if (document.calc.hypf.checked)
{
document.calc.sin.value="ahs "
document.calc.cos.value="ahc "
document.calc.tan.value="aht "
}
else
{
document.calc.sin.value="asin"
document.calc.cos.value="acos"
document.calc.tan.value="atan"
}
document.calc.sqr.value="x^.5"
document.calc.cube.value="x^.3"
document.calc.floor.value="小數"
}
else
{
document.calc.bt.value="d.ms"
document.calc.ln.value=" ln "
document.calc.log.value="log "
if (document.calc.hypf.checked)
{
document.calc.sin.value="hsin"
document.calc.cos.value="hcos"
document.calc.tan.value="htan"
}
else
{
document.calc.sin.value="sin "
document.calc.cos.value="cos "
document.calc.tan.value="tan "
}
document.calc.sqr.value="x^2 "
document.calc.cube.value="x^3 "
document.calc.floor.value="取整"
}
}
//存儲器部分
function clearmemory()
{
mem=0
document.calc.memory.value=" "
}
function getmemory()
{
endNumber=true
document.calc.display.value=decto(mem,carry)
}
function putmemory()
{
endNumber=true
if (document.calc.display.value!=0)
{
mem=todec(document.calc.display.value,carry)
document.calc.memory.value=" M "
}
else
document.calc.memory.value=" "
}
function addmemory()
{
endNumber=true
mem=parseFloat(mem)+parseFloat(todec(document.calc.display.value,carry))
if (mem==0)
document.calc.memory.value=" "
else
document.calc.memory.value=" M "
}
function multimemory()
{
endNumber=true
mem=parseFloat(mem)*parseFloat(todec(document.calc.display.value,carry))
if (mem==0)
document.calc.memory.value=" "
else
document.calc.memory.value=" M "
}
//十進制轉換
function todec(num,oldcarry)
{
if (oldcarry==10 || num==0) return(num)
var neg=(num.charAt(0)=="-")
if (neg) num=num.substr(1)
var newnum=0
for (var index=1;index<=num.length;index++)
newnum=newnum*oldcarry+hexnum.indexOf(num.charAt(index-1))
if (neg)
newnum=-newnum
return(newnum)
}
function decto(num,newcarry)
{
var neg=(num<0)
if (newcarry==10 || num==0) return(num)
num=""+Math.abs(num)
var newnum=""
while (num!=0)
{
newnum=hexnum.charAt(num%newcarry)+newnum
num=Math.floor(num/newcarry)
}
if (neg)
newnum="-"+newnum
return(newnum)
}
//表達式解析
function parse(string)
{
if (string.match(/^(.*\d[\+\-\*\/\%\^\&\|x\<])?([+-]?[0-9a-f\.]+)([\+\-\*\/\%\^\&\|x\<])([+-]?[0-9a-f\.]+)$/))
return(RegExp.$1+cypher(RegExp.$2,RegExp.$3,RegExp.$4))
else
return(string)
}
//數學運算和位運算
function cypher(left,join,right)
{
left=todec(left,carry)
right=todec(right,carry)
if (join=="+")
return(decto(parseFloat(left)+parseFloat(right),carry))
if (join=="-")
return(decto(left-right,carry))
if (join=="*")
return(decto(left*right,carry))
if (join=="/" && right!=0)
return(decto(left/right,carry))
if (join=="%")
return(decto(left%right,carry))
if (join=="&")
return(decto(left&right,carry))
if (join=="|")
return(decto(left|right,carry))
if (join=="^")
return(decto(Math.pow(left,right),carry))
if (join=="x")
return(decto(left^right,carry))
if (join=="<")
return(decto(left<<right,carry))
alert("除數不能為零")
return(left)
}
//函數計算
function funcalc(fun,num)
{
with(Math)
{
if (fun=="pi")
return(PI)
if (fun=="e")
return(E)
if (fun=="abs")
return(abs(num))
if (fun=="ceil")
return(ceil(num))
if (fun=="round")
return(round(num))
if (fun=="floor")
return(floor(num))
if (fun=="deci")
return(num-floor(num))
if (fun=="ln" && num>0)
return(log(num))
if (fun=="exp")
return(exp(num))
if (fun=="log" && num>0)
return(log(num)*LOG10E)
if (fun=="expdec")
return(pow(10,num))
if (fun=="cube")
return(num*num*num)
if (fun=="cubt")
return(pow(num,1/3))
if (fun=="sqr")
return(num*num)
if (fun=="sqrt" && num>=0)
return(sqrt(num))
if (fun=="!")
return(factorial(num))
if (fun=="recip" && num!=0)
return(1/num)
if (fun=="dms")
return(dms(num))
if (fun=="deg")
return(deg(num))
if (fun=="~")
return(~num)
if (angle=="d")
{
if (fun=="sin")
return(sin(degressToRadians(num)))
if (fun=="cos")
return(cos(degressToRadians(num)))
if (fun=="tan")
return(tan(degressToRadians(num)))
if (fun=="arcsin" && abs(num)<=1)
return(radiansToDegress(asin(num)))
if (fun=="arccos" && abs(num)<=1)
return(radiansToDegress(acos(num)))
if (fun=="arctan")
return(radiansToDegress(atan(num)))
}
else
{
if (fun=="sin")
return(sin(num))
if (fun=="cos")
return(cos(num))
if (fun=="tan")
return(tan(num))
if (fun=="arcsin" && abs(num)<=1)
return(asin(num))
if (fun=="arccos" && abs(num)<=1)
return(acos(num))
if (fun=="arctan")
return(atan(num))
}
if (fun=="hypsin")
return((exp(num)-exp(0-num))*0.5)
if (fun=="hypcos")
return((exp(num)+exp(-num))*0.5)
if (fun=="hyptan")
return((exp(num)-exp(-num))/(exp(num)+exp(-num)))
if (fun=="ahypsin" | fun=="hypcos" | fun=="hyptan")
{
alert("對不起,公式還沒有查到!")
return(num)
}
alert("超出函數定義范圍")
return(num)
}
}
function factorial(n)
{
n=Math.abs(parseInt(n))
var fac=1
for (;n>0;n-=1)
fac*=n
return(fac)
}
function dms(n)
{
var neg=(n<0)
with(Math)
{
n=abs(n)
var d=floor(n)
var m=floor(60*(n-d))
var s=(n-d)*60-m
}
var dms=d+m/100+s*0.006
if (neg)
dms=-dms
return(dms)
}
function deg(n)
{
var neg=(n<0)
with(Math)
{
n=abs(n)
var d=floor(n)
var m=floor((n-d)*100)
var s=(n-d)*100-m
}
var deg=d+m/60+s/36
if (neg)
deg=-deg
return(deg)
}
function degressToRadians(degress)
{
return(degress*Math.PI/180)
}
function radiansToDegress(radians)
{
return(radians*180/Math.PI)
}
//界面
//-->
</script>
</head>
<!--written by GoldHuman li hai-->
<!--2000.8-->
<body>
<div align="center">
<form name=calc>
<table border="1" width="500" height="250">
<tr>
<td height=50>
<table width=500>
<td>
<img src="../img/cp_logo.gif">
</td>
<td>
<div align=center>
<input type=text name="display" value="0" readonly size="40">
</div>
</td>
</table>
</td>
</tr>
<tr>
<td>
<table width=500>
<tr>
<td width=290>
<input type=radio name="carry" onClick="inputChangCarry(16)">
十六進制
<input type=radio name="carry" checked onClick="inputChangCarry(10)">
十進制
<input type=radio name="carry" onClick="inputChangCarry(8)">
八進制
<input type=radio name="carry" onClick="inputChangCarry(2)">
二進制
</td>
<td>
</td>
<td width=135>
<input type=radio name="angle" value="d" onClick="inputChangAngle('d')" checked>
角度制
<input type=radio name="angle" value="r" onClick="inputChangAngle('r')">
弧度制
</td>
</tr>
</table>
<table width=500>
<tr>
<td width=170>
<input name="shiftf" type="checkbox" onclick="inputshift()">上檔功能
<input name="hypf" type="checkbox" onclick="inputshift()">雙曲函數
</td>
<td>
<input name="bracket" value="" type=text size=3 readonly style="background-color=lightgrey">
<input name="memory" value="" type=text size=3 readonly style="background-color=lightgrey">
<input name="operator" value="" type=text size=3 readonly style="background-color=lightgrey">
</td>
<td width=183>
<input type="button" value=" 退格 "
onclick="backspace()" style="color=red">
<input type="button" value=" 清屏 "
onClick="document.calc.display.value = 0 " style="color=red">
<input type="button" value=" 全清"
onClick="clearall()" style="color=red">
</td>
</tr>
</table>
<table width=500>
<tr>
<td>
<table>
<tr align=center>
<td>
<input name=pi type="button" value=" PI "
onClick="inputfunction('pi','pi')" style="color=blue">
</td>
<td>
<input name=e type="button" value=" E "
onClick="inputfunction('e','e')" style="color=blue">
</td>
<td>
<input name=bt type="button" value="d.ms"
onClick="inputfunction('dms','deg')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input type="button" value=" ( "
onClick="addbracket()" style="color=#ff00ff">
</td>
<td>
<input type="button" value=" ) "
onClick="disbracket()" style="color=#ff00ff">
</td>
<td>
<input name=ln type="button" value=" ln "
onClick="inputfunction('ln','exp')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input name=sin type="button" value="sin "
onClick="inputtrig('sin','arcsin','hypsin','ahypsin')" style="color=#ff00ff">
</td>
<td>
<input type="button" value="x^y "
onClick="operation('^',7)" style="color=#ff00ff">
</td>
<td>
<input name=log type="button" value="log "
onClick="inputfunction('log','expdec')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input name=cos type="button" value="cos "
onClick="inputtrig('cos','arccos','hypcos','ahypcos')" style="color=#ff00ff">
</td>
<td>
<input name=cube type="button" value="x^3 "
onClick="inputfunction('cube','cubt')" style="color=#ff00ff">
</td>
<td>
<input type="button" value=" n! "
onClick="inputfunction('!','!')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input name=tan type="button" value="tan "
onClick="inputtrig('tan','arctan','hyptan','ahyptan')" style="color=#ff00ff">
</td>
<td>
<input name=sqr type="button" value="x^2 "
onClick="inputfunction('sqr','sqrt')" style="color=#ff00ff">
</td>
<td>
<input type="button" value="1/x "
onClick="inputfunction('recip','recip')" style="color=#ff00ff">
</td>
</tr>
</table>
</td>
<td width=30>
</td>
<td>
<table>
<tr>
<td>
<input type="button" value=" 儲存 "
onClick="putmemory()" style="color=red">
</td>
</tr>
<td>
<input type="button" value=" 取存 "
onClick="getmemory()" style="color=red">
</td>
</tr>
<tr>
<td>
<input type="button" value=" 累存 "
onClick="addmemory()" style="color=red">
</td>
</tr>
<tr>
<td>
<input type="button" value=" 積存 "
onClick="multimemory()" style="color=red">
</td>
</tr>
<tr>
<td height="33">
<input type="button" value=" 清存 "
onClick="clearmemory()" style="color=red">
</td>
</tr>
</table>
</td>
<td width=30>
</td>
<td>
<table>
<tr align=center>
<td>
<input name=k7 type="button" value=" 7 "
onClick="inputkey('7')" style="color=blue">
</td>
<td>
<input name=k8 type="button" value=" 8 "
onClick="inputkey('8')" style="color=blue">
</td>
<td>
<input name=k9 type="button" value=" 9 "
onClick="inputkey('9')" style="color=blue">
</td>
<td>
<input type="button" value=" / "
onClick="operation('/',6)" style="color=red">
</td>
<td>
<input type="button" value="取余"
onClick="operation('%',6)" style="color=red">
</td>
<td>
<input type="button" value=" 與 "
onClick="operation('&',3)" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input name=k4 type="button" value=" 4 "
onClick="inputkey('4')" style="color=blue">
</td>
<td>
<input name=k5 type="button" value=" 5 "
onClick="inputkey('5')" style="color=blue">
</td>
<td>
<input name=k6 type="button" value=" 6 "
onClick="inputkey('6')" style="color=blue">
</td>
<td>
<input type="button" value=" * "
onClick="operation('*',6)" style="color=red">
</td>
<td>
<input name=floor type="button" value="取整"
onClick="inputfunction('floor','deci')" style="color=red">
</td>
<td>
<input type="button" value=" 或 "
onClick="operation('|',1)" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input type="button" value=" 1 "
onClick="inputkey('1')" style="color=blue">
</td>
<td>
<input name=k2 type="button" value=" 2 "
onClick="inputkey('2')" style="color=blue">
</td>
<td>
<input name=k3 type="button" value=" 3 "
onClick="inputkey('3')" style="color=blue">
</td>
<td>
<input type="button" value=" - "
onClick="operation('-',5)" style="color=red">
</td>
<td>
<input type="button" value="左移"
onClick="operation('<',4)" style="color=red">
</td>
<td>
<input type="button" value=" 非 "
onClick="inputfunction('~','~')" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input type="button" value=" 0 "
onClick="inputkey('0')" style="color=blue">
</td>
<td>
<input type="button" value="+/-"
onClick="changeSign()" style="color=blue">
</td>
<td>
<input name=kp type="button" value=" . "
onClick="inputkey('.')" style="color=blue">
</td>
<td>
<input type="button" value=" + "
onClick="operation('+',5)" style="color=red">
</td>
<td>
<input type="button" value=" ＝ "
onClick="result()" style="color=red">
</td>
<td>
<input type="button" value="異或"
onClick="operation('x',2)" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input name=ka type="button" value=" A "
onClick="inputkey('a')" style="color=blue" disabled=true>
</td>
<td>
<input name=kb type="button" value=" B "
onClick="inputkey('b')" style="color=blue" disabled=true>
</td>
<td>
<input name=kc type="button" value=" C "
onClick="inputkey('c')" style="color=blue" disabled=true>
</td>
<td>
<input name=kd type="button" value=" D "
onClick="inputkey('d')" style="color=blue" disabled=true>
</td>
<td>
<input name=ke type="button" value=" E"
onClick="inputkey('e')" style="color=blue" disabled=true>
</td>
<td>
<input name=kf type="button" value=" F"
onClick="inputkey('f')" style="color=blue" disabled=true>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</div>
</body>
</html>
『肆』 製作java計算器
有分加沒啊 ！！！！！！
import java.awt.*;
import java.awt.event.*;
public class jisuanqi extends WindowAdapter {
Panel p1 = new Panel();
Panel p2 = new Panel();
Panel p3 = new Panel();
TextField txt;
private Button[] b = new Button[17];
private String ss[] = { "7", "8", "9", "+", "4", "5", "6", "-", "1", "2",
"3", "*", "清空", "0", "=", "/", "關閉" };
static double a;
static String s, str;// 定義變數 創建對像
public static void main(String args[]) {
(new jisuanqi()).frame();
}
public void frame() {
Frame fm = new Frame("簡單計算器");
for (int i = 0; i <= 16; i++) {
b[i] = new Button(ss[i]);
}
for (int i = 0; i <= 15; i++) {
p2.add(b[i]);
} // 創建按鈕 並添加到P2
b[16].setBackground(Color.yellow);
txt = new TextField(15);
txt.setEditable(false);
for (int i = 0; i <= 16; i++) {
b[i].addActionListener(new buttonlistener());// 添加監聽器
}
b[16].addActionListener(new close());
fm.addWindowListener(this);
fm.setBackground(Color.red);
p1.setLayout(new BorderLayout());
p1.add(txt, "North");
p2.setLayout(new GridLayout(4, 4));
p3.setLayout(new BorderLayout());
p3.add(b[16]);
fm.add(p1, "North");
fm.add(p2, "Center");
fm.add(p3, "South");
fm.pack();
fm.setVisible(true);// 都是些窗中設置 添加相關組件和監聽器
}
public void windowClosing(WindowEvent e) {
System.exit(0);// 退出系統
}
class buttonlistener implements ActionListener {// 編寫監聽器事件 通過按鍵得出給果
public void actionPerformed(ActionEvent e) {
Button btn = (Button) e.getSource();
if (btn.getLabel() == "=") {
jisuan();
str = String.valueOf(a);
txt.setText(str);
s = "";
} else if (btn.getLabel() == "+") {
jisuan();
txt.setText("");
s = "+";
} else if (btn.getLabel() == "-") {
jisuan();
txt.setText("");
s = "-";
} else if (btn.getLabel() == "/") {
jisuan();
txt.setText("");
s = "/";
} else if (btn.getLabel() == "*") {
jisuan();
txt.setText("");
s = "*";
} else {
txt.setText(txt.getText() + btn.getLabel());
if (btn.getLabel() == "清空")
txt.setText("");
}
}
public void jisuan() {// 編寫具體計算方法
if (s == "+")
a += Double.parseDouble(txt.getText());
else if (s == "-")
a -= Double.parseDouble(txt.getText());
else if (s == "*")
a *= Double.parseDouble(txt.getText());
else if (s == "/")
a /= Double.parseDouble(txt.getText());
else
a = Double.parseDouble(txt.getText());
}
}
}
class close implements ActionListener {// 退出
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
}
『伍』 DCR, Decred是什麼
德信幣（Decred）是一種類似於比特幣的加密貨幣，其主要應用包括社區投入、開放管理和可持續的資金籌集與開發。貢獻者：比特網bitewang
『陸』 java計算器代碼,請幫我修改
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>科學計算器</title>
<style>
<!--
BODY {font-size: 12px;background-color: #d4d4d4;color: #0001fC;background-attachment: fixed;}
td{font-size:12px; font-color:#000000}
//-->
</style>
<script language="javascript">
<!--
var endNumber=true
var mem=0
var carry=10
var hexnum="0123456789abcdef"
var angle="d"
var stack=""
var level="0"
var layer=0
//數字鍵
function inputkey(key)
{
var index=key.charCodeAt(0);
if ((carry==2 && (index==48 || index==49))
|| (carry==8 && index>=48 && index<=55)
|| (carry==10 && (index>=48 && index<=57 || index==46))
|| (carry==16 && ((index>=48 && index<=57) || (index>=97 && index<=102))))
if(endNumber)
{
endNumber=false
document.calc.display.value = key
}
else if(document.calc.display.value == null || document.calc.display.value == "0")
document.calc.display.value = key
else
document.calc.display.value += key
}
function changeSign()
{
if (document.calc.display.value!="0")
if(document.calc.display.value.substr(0,1) == "-")
document.calc.display.value = document.calc.display.value.substr(1)
else
document.calc.display.value = "-" + document.calc.display.value
}
//函數鍵
function inputfunction(fun,shiftfun)
{
endNumber=true
if (document.calc.shiftf.checked)
document.calc.display.value=decto(funcalc(shiftfun,(todec(document.calc.display.value,carry))),carry)
else
document.calc.display.value=decto(funcalc(fun,(todec(document.calc.display.value,carry))),carry)
document.calc.shiftf.checked=false
document.calc.hypf.checked=false
inputshift()
}
function inputtrig(trig,arctrig,hyp,archyp)
{
if (document.calc.hypf.checked)
inputfunction(hyp,archyp)
else
inputfunction(trig,arctrig)
}
//運算符
function operation(join,newlevel)
{
endNumber=true
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
while (newlevel!=0 && (newlevel<=(level.charAt(level.length-1))))
{
temp=parse(temp)
level=level.slice(0,-1)
}
if (temp.match(/^(.*\d[\+\-\*\/\%\^\&\|x])?([+-]?[0-9a-f\.]+)$/))
document.calc.display.value=RegExp.$2
stack=stack.substr(0,stack.lastIndexOf("(")+1)+temp+join
document.calc.operator.value=" "+join+" "
level=level+newlevel
}
//括弧
function addbracket()
{
endNumber=true
document.calc.display.value=0
stack=stack+"("
document.calc.operator.value=" "
level=level+0
layer+=1
document.calc.bracket.value="(="+layer
}
function disbracket()
{
endNumber=true
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
while ((level.charAt(level.length-1))>0)
{
temp=parse(temp)
level=level.slice(0,-1)
}
document.calc.display.value=temp
stack=stack.substr(0,stack.lastIndexOf("("))
document.calc.operator.value=" "
level=level.slice(0,-1)
layer-=1
if (layer>0)
document.calc.bracket.value="(="+layer
else
document.calc.bracket.value=""
}
//等號
function result()
{
endNumber=true
while (layer>0)
disbracket()
var temp=stack+document.calc.display.value
while ((level.charAt(level.length-1))>0)
{
temp=parse(temp)
level=level.slice(0,-1)
}
document.calc.display.value=temp
document.calc.bracket.value=""
document.calc.operator.value=""
stack=""
level="0"
}
//修改鍵
function backspace()
{
if (!endNumber)
{
if(document.calc.display.value.length>1)
document.calc.display.value=document.calc.display.value.substring(0,document.calc.display.value.length - 1)
else
document.calc.display.value=0
}
}
function clearall()
{
document.calc.display.value=0
endNumber=true
stack=""
level="0"
layer=""
document.calc.operator.value=""
document.calc.bracket.value=""
}
//轉換鍵
function inputChangCarry(newcarry)
{
endNumber=true
document.calc.display.value=(decto(todec(document.calc.display.value,carry),newcarry))
carry=newcarry
document.calc.sin.disabled=(carry!=10)
document.calc.cos.disabled=(carry!=10)
document.calc.tan.disabled=(carry!=10)
document.calc.bt.disabled=(carry!=10)
document.calc.pi.disabled=(carry!=10)
document.calc.e.disabled=(carry!=10)
document.calc.kp.disabled=(carry!=10)
document.calc.k2.disabled=(carry<=2)
document.calc.k3.disabled=(carry<=2)
document.calc.k4.disabled=(carry<=2)
document.calc.k5.disabled=(carry<=2)
document.calc.k6.disabled=(carry<=2)
document.calc.k7.disabled=(carry<=2)
document.calc.k8.disabled=(carry<=8)
document.calc.k9.disabled=(carry<=8)
document.calc.ka.disabled=(carry<=10)
document.calc.kb.disabled=(carry<=10)
document.calc.kc.disabled=(carry<=10)
document.calc.kd.disabled=(carry<=10)
document.calc.ke.disabled=(carry<=10)
document.calc.kf.disabled=(carry<=10)
}
function inputChangAngle(angletype)
{
endNumber=true
angle=angletype
if (angle=="d")
document.calc.display.value=radiansToDegress(document.calc.display.value)
else
document.calc.display.value=degressToRadians(document.calc.display.value)
endNumber=true
}
function inputshift()
{
if (document.calc.shiftf.checked)
{
document.calc.bt.value="deg "
document.calc.ln.value="exp "
document.calc.log.value="expd"
if (document.calc.hypf.checked)
{
document.calc.sin.value="ahs "
document.calc.cos.value="ahc "
document.calc.tan.value="aht "
}
else
{
document.calc.sin.value="asin"
document.calc.cos.value="acos"
document.calc.tan.value="atan"
}
document.calc.sqr.value="x^.5"
document.calc.cube.value="x^.3"
document.calc.floor.value="小數"
}
else
{
document.calc.bt.value="d.ms"
document.calc.ln.value=" ln "
document.calc.log.value="log "
if (document.calc.hypf.checked)
{
document.calc.sin.value="hsin"
document.calc.cos.value="hcos"
document.calc.tan.value="htan"
}
else
{
document.calc.sin.value="sin "
document.calc.cos.value="cos "
document.calc.tan.value="tan "
}
document.calc.sqr.value="x^2 "
document.calc.cube.value="x^3 "
document.calc.floor.value="取整"
}
}
//存儲器部分
function clearmemory()
{
mem=0
document.calc.memory.value=" "
}
function getmemory()
{
endNumber=true
document.calc.display.value=decto(mem,carry)
}
function putmemory()
{
endNumber=true
if (document.calc.display.value!=0)
{
mem=todec(document.calc.display.value,carry)
document.calc.memory.value=" M "
}
else
document.calc.memory.value=" "
}
function addmemory()
{
endNumber=true
mem=parseFloat(mem)+parseFloat(todec(document.calc.display.value,carry))
if (mem==0)
document.calc.memory.value=" "
else
document.calc.memory.value=" M "
}
function multimemory()
{
endNumber=true
mem=parseFloat(mem)*parseFloat(todec(document.calc.display.value,carry))
if (mem==0)
document.calc.memory.value=" "
else
document.calc.memory.value=" M "
}
//十進制轉換
function todec(num,oldcarry)
{
if (oldcarry==10 || num==0) return(num)
var neg=(num.charAt(0)=="-")
if (neg) num=num.substr(1)
var newnum=0
for (var index=1;index<=num.length;index++)
newnum=newnum*oldcarry+hexnum.indexOf(num.charAt(index-1))
if (neg)
newnum=-newnum
return(newnum)
}
function decto(num,newcarry)
{
var neg=(num<0)
if (newcarry==10 || num==0) return(num)
num=""+Math.abs(num)
var newnum=""
while (num!=0)
{
newnum=hexnum.charAt(num%newcarry)+newnum
num=Math.floor(num/newcarry)
}
if (neg)
newnum="-"+newnum
return(newnum)
}
//表達式解析
function parse(string)
{
if (string.match(/^(.*\d[\+\-\*\/\%\^\&\|x\<])?([+-]?[0-9a-f\.]+)([\+\-\*\/\%\^\&\|x\<])([+-]?[0-9a-f\.]+)$/))
return(RegExp.$1+cypher(RegExp.$2,RegExp.$3,RegExp.$4))
else
return(string)
}
//數學運算和位運算
function cypher(left,join,right)
{
left=todec(left,carry)
right=todec(right,carry)
if (join=="+")
return(decto(parseFloat(left)+parseFloat(right),carry))
if (join=="-")
return(decto(left-right,carry))
if (join=="*")
return(decto(left*right,carry))
if (join=="/" && right!=0)
return(decto(left/right,carry))
if (join=="%")
return(decto(left%right,carry))
if (join=="&")
return(decto(left&right,carry))
if (join=="|")
return(decto(left|right,carry))
if (join=="^")
return(decto(Math.pow(left,right),carry))
if (join=="x")
return(decto(left^right,carry))
if (join=="<")
return(decto(left<<right,carry))
alert("除數不能為零")
return(left)
}
//函數計算
function funcalc(fun,num)
{
with(Math)
{
if (fun=="pi")
return(PI)
if (fun=="e")
return(E)
if (fun=="abs")
return(abs(num))
if (fun=="ceil")
return(ceil(num))
if (fun=="round")
return(round(num))
if (fun=="floor")
return(floor(num))
if (fun=="deci")
return(num-floor(num))
if (fun=="ln" && num>0)
return(log(num))
if (fun=="exp")
return(exp(num))
if (fun=="log" && num>0)
return(log(num)*LOG10E)
if (fun=="expdec")
return(pow(10,num))
if (fun=="cube")
return(num*num*num)
if (fun=="cubt")
return(pow(num,1/3))
if (fun=="sqr")
return(num*num)
if (fun=="sqrt" && num>=0)
return(sqrt(num))
if (fun=="!")
return(factorial(num))
if (fun=="recip" && num!=0)
return(1/num)
if (fun=="dms")
return(dms(num))
if (fun=="deg")
return(deg(num))
if (fun=="~")
return(~num)
if (angle=="d")
{
if (fun=="sin")
return(sin(degressToRadians(num)))
if (fun=="cos")
return(cos(degressToRadians(num)))
if (fun=="tan")
return(tan(degressToRadians(num)))
if (fun=="arcsin" && abs(num)<=1)
return(radiansToDegress(asin(num)))
if (fun=="arccos" && abs(num)<=1)
return(radiansToDegress(acos(num)))
if (fun=="arctan")
return(radiansToDegress(atan(num)))
}
else
{
if (fun=="sin")
return(sin(num))
if (fun=="cos")
return(cos(num))
if (fun=="tan")
return(tan(num))
if (fun=="arcsin" && abs(num)<=1)
return(asin(num))
if (fun=="arccos" && abs(num)<=1)
return(acos(num))
if (fun=="arctan")
return(atan(num))
}
if (fun=="hypsin")
return((exp(num)-exp(0-num))*0.5)
if (fun=="hypcos")
return((exp(num)+exp(-num))*0.5)
if (fun=="hyptan")
return((exp(num)-exp(-num))/(exp(num)+exp(-num)))
if (fun=="ahypsin" | fun=="hypcos" | fun=="hyptan")
{
alert("對不起,公式還沒有查到!")
return(num)
}
alert("超出函數定義范圍")
return(num)
}
}
function factorial(n)
{
n=Math.abs(parseInt(n))
var fac=1
for (;n>0;n-=1)
fac*=n
return(fac)
}
function dms(n)
{
var neg=(n<0)
with(Math)
{
n=abs(n)
var d=floor(n)
var m=floor(60*(n-d))
var s=(n-d)*60-m
}
var dms=d+m/100+s*0.006
if (neg)
dms=-dms
return(dms)
}
function deg(n)
{
var neg=(n<0)
with(Math)
{
n=abs(n)
var d=floor(n)
var m=floor((n-d)*100)
var s=(n-d)*100-m
}
var deg=d+m/60+s/36
if (neg)
deg=-deg
return(deg)
}
function degressToRadians(degress)
{
return(degress*Math.PI/180)
}
function radiansToDegress(radians)
{
return(radians*180/Math.PI)
}
//界面
//-->
</script>
</head>
<!--written by GoldHuman li hai-->
<!--2000.8-->
<body>
<div align="center">
<form name=calc>
<table border="1" width="500" height="250">
<tr>
<td height=50>
<table width=500>
<td width="133">
</td>
<td width="353">
<div align=center>
<input type=text name="display" value="0" readonly size="40">
</div>
</td>
</table>
</td>
</tr>
<tr>
<td>
<table width=500>
<tr>
<td width=290>
<input type=radio name="carry" onClick="inputChangCarry(16)">
十六進制
<input type=radio name="carry" checked onClick="inputChangCarry(10)">
十進制
<input type=radio name="carry" onClick="inputChangCarry(8)">
八進制
<input type=radio name="carry" onClick="inputChangCarry(2)">
二進制
</td>
<td>
</td>
<td width=135>
<input type=radio name="angle" value="d" onClick="inputChangAngle('d')" checked>
角度制
<input type=radio name="angle" value="r" onClick="inputChangAngle('r')">
弧度制
</td>
</tr>
</table>
<table width=500>
<tr>
<td width=170>
<input name="shiftf" type="checkbox" onclick="inputshift()">上檔功能
<input name="hypf" type="checkbox" onclick="inputshift()">雙曲函數
</td>
<td>
<input name="bracket" value="" type=text size=3 readonly style="background-color=lightgrey">
<input name="memory" value="" type=text size=3 readonly style="background-color=lightgrey">
<input name="operator" value="" type=text size=3 readonly style="background-color=lightgrey">
</td>
<td width=183>
<input type="button" value=" 退格 "
onclick="backspace()" style="color=red">
<input type="button" value=" 清屏 "
onClick="document.calc.display.value = 0 " style="color=red">
<input type="button" value=" 全清"
onClick="clearall()" style="color=red">
</td>
</tr>
</table>
<table width=500>
<tr>
<td>
<table>
<tr align=center>
<td>
<input name=pi type="button" value=" PI "
onClick="inputfunction('pi','pi')" style="color=blue">
</td>
<td>
<input name=e type="button" value=" E "
onClick="inputfunction('e','e')" style="color=blue">
</td>
<td>
<input name=bt type="button" value="d.ms"
onClick="inputfunction('dms','deg')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input type="button" value=" ( "
onClick="addbracket()" style="color=#ff00ff">
</td>
<td>
<input type="button" value=" ) "
onClick="disbracket()" style="color=#ff00ff">
</td>
<td>
<input name=ln type="button" value=" ln "
onClick="inputfunction('ln','exp')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input name=sin type="button" value="sin "
onClick="inputtrig('sin','arcsin','hypsin','ahypsin')" style="color=#ff00ff">
</td>
<td>
<input type="button" value="x^y "
onClick="operation('^',7)" style="color=#ff00ff">
</td>
<td>
<input name=log type="button" value="log "
onClick="inputfunction('log','expdec')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input name=cos type="button" value="cos "
onClick="inputtrig('cos','arccos','hypcos','ahypcos')" style="color=#ff00ff">
</td>
<td>
<input name=cube type="button" value="x^3 "
onClick="inputfunction('cube','cubt')" style="color=#ff00ff">
</td>
<td>
<input type="button" value=" n! "
onClick="inputfunction('!','!')" style="color=#ff00ff">
</td>
</tr>
<tr align=center>
<td>
<input name=tan type="button" value="tan "
onClick="inputtrig('tan','arctan','hyptan','ahyptan')" style="color=#ff00ff">
</td>
<td>
<input name=sqr type="button" value="x^2 "
onClick="inputfunction('sqr','sqrt')" style="color=#ff00ff">
</td>
<td>
<input type="button" value="1/x "
onClick="inputfunction('recip','recip')" style="color=#ff00ff">
</td>
</tr>
</table>
</td>
<td width=30>
</td>
<td>
<table>
<tr>
<td>
<input type="button" value=" 儲存 "
onClick="putmemory()" style="color=red">
</td>
</tr>
<td>
<input type="button" value=" 取存 "
onClick="getmemory()" style="color=red">
</td>
</tr>
<tr>
<td>
<input type="button" value=" 累存 "
onClick="addmemory()" style="color=red">
</td>
</tr>
<tr>
<td>
<input type="button" value=" 積存 "
onClick="multimemory()" style="color=red">
</td>
</tr>
<tr>
<td height="33">
<input type="button" value=" 清存 "
onClick="clearmemory()" style="color=red">
</td>
</tr>
</table>
</td>
<td width=30>
</td>
<td>
<table>
<tr align=center>
<td>
<input name=k7 type="button" value=" 7 "
onClick="inputkey('7')" style="color=blue">
</td>
<td>
<input name=k8 type="button" value=" 8 "
onClick="inputkey('8')" style="color=blue">
</td>
<td>
<input name=k9 type="button" value=" 9 "
onClick="inputkey('9')" style="color=blue">
</td>
<td>
<input type="button" value=" / "
onClick="operation('/',6)" style="color=red">
</td>
<td>
<input type="button" value="取余"
onClick="operation('%',6)" style="color=red">
</td>
<td>
<input type="button" value=" 與 "
onClick="operation('&',3)" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input name=k4 type="button" value=" 4 "
onClick="inputkey('4')" style="color=blue">
</td>
<td>
<input name=k5 type="button" value=" 5 "
onClick="inputkey('5')" style="color=blue">
</td>
<td>
<input name=k6 type="button" value=" 6 "
onClick="inputkey('6')" style="color=blue">
</td>
<td>
<input type="button" value=" * "
onClick="operation('*',6)" style="color=red">
</td>
<td>
<input name=floor type="button" value="取整"
onClick="inputfunction('floor','deci')" style="color=red">
</td>
<td>
<input type="button" value=" 或 "
onClick="operation('|',1)" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input type="button" value=" 1 "
onClick="inputkey('1')" style="color=blue">
</td>
<td>
<input name=k2 type="button" value=" 2 "
onClick="inputkey('2')" style="color=blue">
</td>
<td>
<input name=k3 type="button" value=" 3 "
onClick="inputkey('3')" style="color=blue">
</td>
<td>
<input type="button" value=" - "
onClick="operation('-',5)" style="color=red">
</td>
<td>
<input type="button" value="左移"
onClick="operation('<',4)" style="color=red">
</td>
<td>
<input type="button" value=" 非 "
onClick="inputfunction('~','~')" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input type="button" value=" 0 "
onClick="inputkey('0')" style="color=blue">
</td>
<td>
<input type="button" value="+/-"
onClick="changeSign()" style="color=blue">
</td>
<td>
<input name=kp type="button" value=" . "
onClick="inputkey('.')" style="color=blue">
</td>
<td>
<input type="button" value=" + "
onClick="operation('+',5)" style="color=red">
</td>
<td>
<input type="button" value=" ＝ "
onClick="result()" style="color=red">
</td>
<td>
<input type="button" value="異或"
onClick="operation('x',2)" style="color=red">
</td>
</tr>
<tr align=center>
<td>
<input name=ka type="button" value=" A "
onClick="inputkey('a')" style="color=blue" disabled=true>
</td>
<td>
<input name=kb type="button" value=" B "
onClick="inputkey('b')" style="color=blue" disabled=true>
</td>
<td>
<input name=kc type="button" value=" C "
onClick="inputkey('c')" style="color=blue" disabled=true>
</td>
<td>
<input name=kd type="button" value=" D "
onClick="inputkey('d')" style="color=blue" disabled=true>
</td>
<td>
<input name=ke type="button" value=" E"
onClick="inputkey('e')" style="color=blue" disabled=true>
</td>
<td>
<input name=kf type="button" value=" F"
onClick="inputkey('f')" style="color=blue" disabled=true>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</div>
</body>
</html>
『柒』 什麼是POW和POS，二者區別聯系
POW：全稱Proof of Work，工作量證明。
POS：全稱Proof of Stake，權益證明。
區別是：
1、POW機制：工作量證明機制即對於工作量的證明，是生成要加入到區塊鏈中的一筆新的交易信息(即新區塊)時必須滿足的要求。在基於工作量證明機制構建的區塊鏈網路中，節點通過計算隨機哈希散列的數值解爭奪記賬權，求得正確的數值解以生成區塊的能力是節點算力的具體表現。
2、POS機制：權益證明要求證明人提供一定數量加密貨幣的所有權即可。權益證明機制的運作方式是，當創造一個新區塊時，礦工需要創建一個「幣權」交易，交易會按照預先設定的比例把一些幣發送給礦工本身。權益證明機制根據每個節點擁有代幣的比例和時間，依據演算法等比例地降低節點的挖礦難度，從而加快了尋找隨機數的速度。
(7)decred算力計算器擴展閱讀：
比特幣（BitCoin）的概念最初由中本聰在2009年提出，根據中本聰的思路設計發布的開源軟體以及建構其上的P2P網路。比特幣是一種P2P形式的數字貨幣。點對點的傳輸意味著一個去中心化的支付系統。
與大多數貨幣不同，比特幣不依靠特定貨幣機構發行，它依據特定演算法，通過大量的計算產生，比特幣經濟使用整個P2P網路中眾多節點構成的分布式資料庫來確認並記錄所有的交易行為，並使用密碼學的設計來確保貨幣流通各個環節安全性。P2P的去中心化特性與演算法本身可以確保無法通過大量製造比特幣來人為操控幣值。
『捌』 D9礦機收益怎麼樣
目前收益一天幾十，
『玖』 請問誰能用java語言,為我寫一個計算器的小程序
<!--開始 -->
<STYLE>BODY {
BACKGROUND-ATTACHMENT: fixed; BACKGROUND-COLOR: #edf0e1; COLOR: #0001fc; FONT-FAMILY: "宋體", "Arial", "Times New Roman"; FONT-SIZE: 9pt
}
TD {
FONT-FAMILY: "宋體", "Arial Narrow", "Times New Roman"; FONT-SIZE: 9pt; font-color: #000000
}
</STYLE>
<SCRIPT language=javascript>
<!--
var endNumber=true
var mem=0
var carry=10
var hexnum="0123456789abcdef"
var angle="d"
var stack=""
var level="0"
var layer=0
//數字鍵
function inputkey(key)
{
var index=key.charCodeAt(0);
if ((carry==2 && (index==48 || index==49))
|| (carry==8 && index>=48 && index<=55)
|| (carry==10 && (index>=48 && index<=57 || index==46))
|| (carry==16 && ((index>=48 && index<=57) || (index>=97 && index<=102))))
if(endNumber)
{
endNumber=false
document.calc.display.value = key
}
else if(document.calc.display.value == null || document.calc.display.value == "0")
document.calc.display.value = key
else
document.calc.display.value += key
}
function changeSign()
{
if (document.calc.display.value!="0")
if(document.calc.display.value.substr(0,1) == "-")
document.calc.display.value = document.calc.display.value.substr(1)
else
document.calc.display.value = "-" + document.calc.display.value
}
//函數鍵
function inputfunction(fun,shiftfun)
{
endNumber=true
if (document.calc.shiftf.checked)
document.calc.display.value=decto(funcalc(shiftfun,(todec(document.calc.display.value,carry))),carry)
else
document.calc.display.value=decto(funcalc(fun,(todec(document.calc.display.value,carry))),carry)
document.calc.shiftf.checked=false
document.calc.hypf.checked=false
inputshift()
}
function inputtrig(trig,arctrig,hyp,archyp)
{
if (document.calc.hypf.checked)
inputfunction(hyp,archyp)
else
inputfunction(trig,arctrig)
}
//運算符
function operation(join,newlevel)
{
endNumber=true
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
while (newlevel!=0 && (newlevel<=(level.charAt(level.length-1))))
{
temp=parse(temp)
level=level.slice(0,-1)
}
if (temp.match(/^(.*\d[\+\-\*\/\%\^\&\|x])?([+-]?[0-9a-f\.]+)$/))
document.calc.display.value=RegExp.$2
stack=stack.substr(0,stack.lastIndexOf("(")+1)+temp+join
document.calc.operator.value=" "+join+" "
level=level+newlevel
}
//括弧
function addbracket()
{
endNumber=true
document.calc.display.value=0
stack=stack+"("
document.calc.operator.value=" "
level=level+0
layer+=1
document.calc.bracket.value="(="+layer
}
function disbracket()
{
endNumber=true
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
while ((level.charAt(level.length-1))>0)
{
temp=parse(temp)
level=level.slice(0,-1)
}
document.calc.display.value=temp
stack=stack.substr(0,stack.lastIndexOf("("))
document.calc.operator.value=" "
level=level.slice(0,-1)
layer-=1
if (layer>0)
document.calc.bracket.value="(="+layer
else
document.calc.bracket.value=""
}
//等號
function result()
{
endNumber=true
while (layer>0)
disbracket()
var temp=stack+document.calc.display.value
while ((level.charAt(level.length-1))>0)
{
temp=parse(temp)
level=level.slice(0,-1)
}
document.calc.display.value=temp
document.calc.bracket.value=""
document.calc.operator.value=""
stack=""
level="0"
}
//修改鍵
function backspace()
{
if (!endNumber)
{
if(document.calc.display.value.length>1)
document.calc.display.value=document.calc.display.value.substring(0,document.calc.display.value.length - 1)
else
document.calc.display.value=0
}
}
function clearall()
{
document.calc.display.value=0
endNumber=true
stack=""
level="0"
layer=""
document.calc.operator.value=""
document.calc.bracket.value=""
}
//轉換鍵
function inputChangCarry(newcarry)
{
endNumber=true
document.calc.display.value=(decto(todec(document.calc.display.value,carry),newcarry))
carry=newcarry
document.calc.sin.disabled=(carry!=10)
document.calc.cos.disabled=(carry!=10)
document.calc.tan.disabled=(carry!=10)
document.calc.bt.disabled=(carry!=10)
document.calc.pi.disabled=(carry!=10)
document.calc.e.disabled=(carry!=10)
document.calc.kp.disabled=(carry!=10)
document.calc.k2.disabled=(carry<=2)
document.calc.k3.disabled=(carry<=2)
document.calc.k4.disabled=(carry<=2)
document.calc.k5.disabled=(carry<=2)
document.calc.k6.disabled=(carry<=2)
document.calc.k7.disabled=(carry<=2)
document.calc.k8.disabled=(carry<=8)
document.calc.k9.disabled=(carry<=8)
document.calc.ka.disabled=(carry<=10)
document.calc.kb.disabled=(carry<=10)
document.calc.kc.disabled=(carry<=10)
document.calc.kd.disabled=(carry<=10)
document.calc.ke.disabled=(carry<=10)
document.calc.kf.disabled=(carry<=10)
}
function inputChangAngle(angletype)
{
endNumber=true
angle=angletype
if (angle=="d")
document.calc.display.value=radiansToDegress(document.calc.display.value)
else
document.calc.display.value=degressToRadians(document.calc.display.value)
endNumber=true
}
function inputshift()
{
if (document.calc.shiftf.checked)
{
document.calc.bt.value="deg "
document.calc.ln.value="exp "
document.calc.log.value="expd"
if (document.calc.hypf.checked)
{
document.calc.sin.value="ahs "
document.calc.cos.value="ahc "
document.calc.tan.value="aht "
}
else
{
document.calc.sin.value="asin"
document.calc.cos.value="acos"
document.calc.tan.value="atan"
}
document.calc.sqr.value="x^.5"
document.calc.cube.value="x^.3"
document.calc.floor.value="小數"
}
else
{
document.calc.bt.value="d.ms"
document.calc.ln.value=" ln "
document.calc.log.value="log "
if (document.calc.hypf.checked)
{
document.calc.sin.value="hsin"
document.calc.cos.value="hcos"
document.calc.tan.value="htan"
}
else
{
document.calc.sin.value="sin "
document.calc.cos.value="cos "
document.calc.tan.value="tan "
}
document.calc.sqr.value="x^2 "
document.calc.cube.value="x^3 "
document.calc.floor.value="取整"
}
}
//存儲器部分
function clearmemory()
{
mem=0
document.calc.memory.value=" "
}
function getmemory()
{
endNumber=true
document.calc.display.value=decto(mem,carry)
}
function putmemory()
{
endNumber=true
if (document.calc.display.value!=0)
{
mem=todec(document.calc.display.value,carry)
document.calc.memory.value=" M "
}
else
document.calc.memory.value=" "
}
function addmemory()
{
endNumber=true
mem=parseFloat(mem)+parseFloat(todec(document.calc.display.value,carry))
if (mem==0)
document.calc.memory.value=" "
else
document.calc.memory.value=" M "
}
function multimemory()
{
endNumber=true
mem=parseFloat(mem)*parseFloat(todec(document.calc.display.value,carry))
if (mem==0)
document.calc.memory.value=" "
else
document.calc.memory.value=" M "
}
//十進制轉換
function todec(num,oldcarry)
{
if (oldcarry==10 || num==0) return(num)
var neg=(num.charAt(0)=="-")
if (neg) num=num.substr(1)
var newnum=0
for (var index=1;index<=num.length;index++)
newnum=newnum*oldcarry+hexnum.indexOf(num.charAt(index-1))
if (neg)
newnum=-newnum
return(newnum)
}
function decto(num,newcarry)
{
var neg=(num<0)
if (newcarry==10 || num==0) return(num)
num=""+Math.abs(num)
var newnum=""
while (num!=0)
{
newnum=hexnum.charAt(num%newcarry)+newnum
num=Math.floor(num/newcarry)
}
if (neg)
newnum="-"+newnum
return(newnum)
}
//表達式解析
function parse(string)
{
if (string.match(/^(.*\d[\+\-\*\/\%\^\&\|x\<])?([+-]?[0-9a-f\.]+)([\+\-\*\/\%\^\&\|x\<])([+-]?[0-9a-f\.]+)$/))
return(RegExp.$1+cypher(RegExp.$2,RegExp.$3,RegExp.$4))
else
return(string)
}
//數學運算和位運算
function cypher(left,join,right)
{
left=todec(left,carry)
right=todec(right,carry)
if (join=="+")
return(decto(parseFloat(left)+parseFloat(right),carry))
if (join=="-")
return(decto(left-right,carry))
if (join=="*")
return(decto(left*right,carry))
if (join=="/" && right!=0)
return(decto(left/right,carry))
if (join=="%")
return(decto(left%right,carry))
if (join=="&")
return(decto(left&right,carry))
if (join=="|")
return(decto(left|right,carry))
if (join=="^")
return(decto(Math.pow(left,right),carry))
if (join=="x")
return(decto(left^right,carry))
if (join=="<")
return(decto(left<<right,carry))
alert("除數不能為零")
return(left)
}
//函數計算
function funcalc(fun,num)
{
with(Math)
{
if (fun=="pi")
return(PI)
if (fun=="e")
return(E)
if (fun=="abs")
return(abs(num))
if (fun=="ceil")
return(ceil(num))
if (fun=="round")
return(round(num))
if (fun=="floor")
return(floor(num))
if (fun=="deci")
return(num-floor(num))
if (fun=="ln" && num>0)
return(log(num))
if (fun=="exp")
return(exp(num))
if (fun=="log" && num>0)
return(log(num)*LOG10E)
if (fun=="expdec")
return(pow(10,num))
if (fun=="cube")
return(num*num*num)
if (fun=="cubt")
return(pow(num,1/3))
if (fun=="sqr")
return(num*num)
if (fun=="sqrt" && num>=0)
return(sqrt(num))
if (fun=="!")
return(factorial(num))
if (fun=="recip" && num!=0)
return(1/num)
if (fun=="dms")
return(dms(num))
if (fun=="deg")
return(deg(num))
if (fun=="~")
return(~num)
if (angle=="d")
{
if (fun=="sin")
return(sin(degressToRadians(num)))
if (fun=="cos")
return(cos(degressToRadians(num)))
if (fun=="tan")
return(tan(degressToRadians(num)))
if (fun=="arcsin" && abs(num)<=1)
return(radiansToDegress(asin(num)))
if (fun=="arccos" && abs(num)<=1)
return(radiansToDegress(acos(num)))
if (fun=="arctan")
return(radiansToDegress(atan(num)))
}
else
{
if (fun=="sin")
return(sin(num))
if (fun=="cos")
return(cos(num))
if (fun=="tan")
return(tan(num))
if (fun=="arcsin" && abs(num)<=1)
return(asin(num))
if (fun=="arccos" && abs(num)<=1)
return(acos(num))
if (fun=="arctan")
return(atan(num))
}
if (fun=="hypsin")
return((exp(num)-exp(0-num))*0.5)
if (fun=="hypcos")
return((exp(num)+exp(-num))*0.5)
if (fun=="hyptan")
return((exp(num)-exp(-num))/(exp(num)+exp(-num)))
if (fun=="ahypsin" | fun=="hypcos" | fun=="hyptan")
{
alert("對不起,公式還沒有查到!")
return(num)
}
alert("超出函數定義范圍")
return(num)
}
}
function factorial(n)
{
n=Math.abs(parseInt(n))
var fac=1
for (;n>0;n-=1)
fac*=n
return(fac)
}
function dms(n)
{
var neg=(n<0)
with(Math)
{
n=abs(n)
var d=floor(n)
var m=floor(60*(n-d))
var s=(n-d)*60-m
}
var dms=d+m/100+s*0.006
if (neg)
dms=-dms
return(dms)
}
function deg(n)
{
var neg=(n<0)
with(Math)
{
n=abs(n)
var d=floor(n)
var m=floor((n-d)*100)
var s=(n-d)*100-m
}
var deg=d+m/60+s/36
if (neg)
deg=-deg
return(deg)
}
function degressToRadians(degress)
{
return(degress*Math.PI/180)
}
function radiansToDegress(radians)
{
return(radians*180/Math.PI)
}
//界面
//-->
</SCRIPT>
<!--written by GoldHuman li hai--><!--2000.8-->
<META content="Microsoft FrontPage 4.0" name=GENERATOR></HEAD>
<BODY>
<DIV align=center>
<FORM name=calc>
<TABLE height=250 width=500 border=1>
<TBODY>
<TR>
<TD height=50>
<TABLE width=500>
<TBODY>
<TR>
<TD></TD>
<TD>
<DIV align=center><INPUT readOnly size=40 value=0 name=display> </DIV></TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD>
<TABLE width=500>
<TBODY>
<TR>
<TD width=290><INPUT onclick=inputChangCarry(16) type=radio name=carry> 十六進制 <INPUT onclick=inputChangCarry(10) type=radio CHECKED name=carry> 十進制 <INPUT onclick=inputChangCarry(8) type=radio name=carry> 八進制 <INPUT onclick=inputChangCarry(2) type=radio name=carry> 二進制 </TD>
<TD></TD>
<TD width=135><INPUT onclick="inputChangAngle('d')" type=radio CHECKED value=d name=angle> 角度制 <INPUT onclick="inputChangAngle('r')" type=radio value=r name=angle> 弧度制 </TD></TR></TBODY></TABLE>
<TABLE width=500>
<TBODY>
<TR>
<TD width=170><INPUT onclick=inputshift() type=checkbox name=shiftf>上檔功能 <INPUT onclick=inputshift() type=checkbox name=hypf>雙曲函數 </TD>
<TD><INPUT style="BACKGROUND-COLOR: lightgrey" readOnly size=3 name=bracket> <INPUT style="BACKGROUND-COLOR: lightgrey" readOnly size=3 name=memory> <INPUT style="BACKGROUND-COLOR: lightgrey" readOnly size=3 name=operator> </TD>
<TD width=183><INPUT style="COLOR: red" onclick=backspace() type=button value=" 退格 "> <INPUT style="COLOR: red" onclick="document.calc.display.value = 0 " type=button value=" 清屏 "> <INPUT style="COLOR: red" onclick=clearall() type=button value=" 全清"> </TD></TR></TBODY></TABLE>
<TABLE width=500>
<TBODY>
<TR>
<TD>
<TABLE>
<TBODY>
<TR align=middle>
<TD><INPUT style="COLOR: blue" onclick="inputfunction('pi','pi')" type=button value=" PI " name=pi> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputfunction('e','e')" type=button value=" E " name=e> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('dms','deg')" type=button value=d.ms name=bt> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: #ff00ff" onclick=addbracket() type=button value=" ( "> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick=disbracket() type=button value=" ) "> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('ln','exp')" type=button value=" ln " name=ln> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputtrig('sin','arcsin','hypsin','ahypsin')" type=button value="sin " name=sin> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="operation('^',7)" type=button value="x^y "> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('log','expdec')" type=button value="log " name=log> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputtrig('cos','arccos','hypcos','ahypcos')" type=button value="cos " name=cos> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('cube','cubt')" type=button value="x^3 " name=cube> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('!','!')" type=button value=" n! "> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputtrig('tan','arctan','hyptan','ahyptan')" type=button value="tan " name=tan> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('sqr','sqrt')" type=button value="x^2 " name=sqr> </TD>
<TD><INPUT style="COLOR: #ff00ff" onclick="inputfunction('recip','recip')" type=button value="1/x "> </TD></TR></TBODY></TABLE></TD>
<TD width=30></TD>
<TD>
<TABLE>
<TBODY>
<TR>
<TD><INPUT style="COLOR: red" onclick=putmemory() type=button value=" 儲存 "> </TD></TR>
<TR>
<TD><INPUT style="COLOR: red" onclick=getmemory() type=button value=" 取存 "> </TD></TR>
<TR>
<TD><INPUT style="COLOR: red" onclick=addmemory() type=button value=" 累存 "> </TD></TR>
<TR>
<TD><INPUT style="COLOR: red" onclick=multimemory() type=button value=" 積存 "> </TD></TR>
<TR>
<TD height=33><INPUT style="COLOR: red" onclick=clearmemory() type=button value=" 清存 "> </TD></TR></TBODY></TABLE></TD>
<TD width=30></TD>
<TD>
<TABLE>
<TBODY>
<TR align=middle>
<TD><INPUT style="COLOR: blue" onclick="inputkey('7')" type=button value=" 7 " name=k7> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('8')" type=button value=" 8 " name=k8> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('9')" type=button value=" 9 " name=k9> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('/',6)" type=button value=" / "> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('%',6)" type=button value=取余> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('&',3)" type=button value=" 與 "> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: blue" onclick="inputkey('4')" type=button value=" 4 " name=k4> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('5')" type=button value=" 5 " name=k5> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('6')" type=button value=" 6 " name=k6> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('*',6)" type=button value=" * "> </TD>
<TD><INPUT style="COLOR: red" onclick="inputfunction('floor','deci')" type=button value=取整 name=floor> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('|',1)" type=button value=" 或 "> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: blue" onclick="inputkey('1')" type=button value=" 1 "> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('2')" type=button value=" 2 " name=k2> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('3')" type=button value=" 3 " name=k3> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('-',5)" type=button value=" - "> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('<',4)" type=button value=左移> </TD>
<TD><INPUT style="COLOR: red" onclick="inputfunction('~','~')" type=button value=" 非 "> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: blue" onclick="inputkey('0')" type=button value=" 0 "> </TD>
<TD><INPUT style="COLOR: blue" onclick=changeSign() type=button value=+/-> </TD>
<TD><INPUT style="COLOR: blue" onclick="inputkey('.')" type=button value=" . " name=kp> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('+',5)" type=button value=" + "> </TD>
<TD><INPUT style="COLOR: red" onclick=result() type=button value=" ＝ "> </TD>
<TD><INPUT style="COLOR: red" onclick="operation('x',2)" type=button value=異或> </TD></TR>
<TR align=middle>
<TD><INPUT style="COLOR: blue" disabled onclick="inputkey('a')" type=button value=" A " name=ka> </TD>
<TD><INPUT style="COLOR: blue" disabled onclick="inputkey('b')" type=button value=" B " name=kb> </TD>
<TD><INPUT style="COLOR: blue" disabled onclick="inputkey('c')" type=button value=" C " name=kc> </TD>
<TD><INPUT style="COLOR: blue" disabled onclick="inputkey('d')" type=button value=" D " name=kd> </TD>
<TD><INPUT style="COLOR: blue" disabled onclick="inputkey('e')" type=button value=" E" name=ke> </TD>
<TD><INPUT style="COLOR: blue" disabled onclick="inputkey('f')" type=button value=" F" name=kf> </TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></FORM></DIV><%referer=Request.ServerVariables ("HTTP_REFERER")%>
<!--結束 -->
『拾』 Delphi7.0的計算器代碼
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls, Buttons, Menus;
type
TForm1 = class(TForm)
Edit1: TEdit;
Panel1: TPanel;
SpeedButton1: TSpeedButton;
SpeedButton2: TSpeedButton;
SpeedButton3: TSpeedButton;
SpeedButton4: TSpeedButton;
SpeedButton6: TSpeedButton;
SpeedButton7: TSpeedButton;
SpeedButton8: TSpeedButton;
SpeedButton9: TSpeedButton;
SpeedButton10: TSpeedButton;
SpeedButton12: TSpeedButton;
SpeedButton13: TSpeedButton;
SpeedButton14: TSpeedButton;
SpeedButton15: TSpeedButton;
SpeedButton16: TSpeedButton;
SpeedButton17: TSpeedButton;
SpeedButton11: TSpeedButton;
SpeedButton18: TSpeedButton;
SpeedButton19: TSpeedButton;
SpeedButton20: TSpeedButton;
SpeedButton21: TSpeedButton;
SpeedButton5: TSpeedButton;
MainMenu1: TMainMenu;
zhua1: TMenuItem;
N1: TMenuItem;
N2: TMenuItem;
N3: TMenuItem;
SpeedButton22: TSpeedButton;
N4: TMenuItem;
procere SpeedButton20Click(Sender: TObject);
procere SpeedButton1Click(Sender: TObject);
procere SpeedButton2Click(Sender: TObject);
procere SpeedButton3Click(Sender: TObject);
procere SpeedButton4Click(Sender: TObject);
procere SpeedButton6Click(Sender: TObject);
procere SpeedButton7Click(Sender: TObject);
procere SpeedButton13Click(Sender: TObject);
procere SpeedButton12Click(Sender: TObject);
procere SpeedButton14Click(Sender: TObject);
procere SpeedButton15Click(Sender: TObject);
procere SpeedButton17Click(Sender: TObject);
procere SpeedButton5Click(Sender: TObject);
procere SpeedButton19Click(Sender: TObject);
procere SpeedButton11Click(Sender: TObject);
procere SpeedButton18Click(Sender: TObject);
procere SpeedButton21Click(Sender: TObject);
procere SpeedButton16Click(Sender: TObject);
procere N1Click(Sender: TObject);
procere SpeedButton22Click(Sender: TObject);
procere N2Click(Sender: TObject);
procere FormCreate(Sender: TObject);
procere N4Click(Sender: TObject);
procere Edit1KeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
procere Edit1KeyPress(Sender: TObject; var Key: Char);
private
//將窗體變數放置在這里也可以，這樣如果有
//Form2就無法訪問
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
flag : Integer =0;
flag1: Integer =0; // 是否復位的標記
flag3: Integer =0; //小數點的標記
Temp1: string = '';
Temp2: real=0; //注意變數的定義
implementation
{$R *.dfm}
procere TForm1.SpeedButton20Click(Sender: TObject);
begin
if SpeedButton20.Caption = '關閉' then
begin
SpeedButton20.Caption := '打開' ;
SpeedButton20.Font.Color := clGreen
end
else
begin
SpeedButton20.Caption := '關閉';
SpeedButton20.Font.Color := clSilver
end;
end;
procere TForm1.SpeedButton1Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1=5 then Edit1.Text := '';
if SpeedButton20.Caption = '打開' then
begin
Edit1.Text := Edit1.text+'1';flag1 := 0;
end
end;
procere TForm1.SpeedButton2Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text :='';
if SpeedButton20.Caption = '打開' then
begin
Edit1.Text := Edit1.text+'2'; flag1 := 0;
end;
end;
procere TForm1.SpeedButton3Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption='打開' then
begin
Edit1.Text := Edit1.text+'3'; flag1:=0;
end;
end;
procere TForm1.SpeedButton4Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption='打開' then
begin
Edit1.Text := Edit1.text+'4'; flag1 := 0;
end;
end;
procere TForm1.SpeedButton6Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption='打開' then
begin
Edit1.Text:=Edit1.text+'5'; flag1:=0;
end;
end;
procere TForm1.SpeedButton7Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption = '打開' then
begin
Edit1.Text := Edit1.text+'6'; flag1:=0;
end;
end;
procere TForm1.SpeedButton13Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption = '打開' then
begin
Edit1.Text := Edit1.text+'7'; flag1 := 0;
end;
end;
procere TForm1.SpeedButton12Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption='打開' then
begin
Edit1.Text:=Edit1.text+'8'; flag1:=0;
end;
end;
procere TForm1.SpeedButton14Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack; //為每個Button恢復顏色 目的是區分數據是結果還是參加數
if flag1=5 then Edit1.Text := '';
if SpeedButton20.Caption='打開' then
begin
Edit1.Text := Edit1.text+'9'; flag1 := 0;
end;
end;
procere TForm1.SpeedButton15Click(Sender: TObject);
begin
Edit1.Font.Color := clBlack;
if flag1 = 5 then Edit1.Text := '';
if SpeedButton20.Caption = '打開' then
begin
Edit1.Text := Edit1.text+'0'; flag1 := 0;
end;
end;
procere TForm1.SpeedButton17Click(Sender: TObject);
begin
Edit1.Clear;
flag := 0;
flag1 := 5; // 是否復位的標記
flag3 :=0; //小數點的標記
Temp1 := '';
Temp2 :=0; //注意變數的定義
end;
procere TForm1.SpeedButton5Click(Sender: TObject);
begin
Edit1.Font.Color := Clgreen; //設置輸入顏色
if (edit1.Text<>'+') and (edit1.Text<>'-')and (edit1.Text<>'*') and (edit1.Text<>'/')
and(edit1.text<>'')
then
begin
try //僅僅作為實驗，記住使用的格式
case flag of //切記case 不支持字元型
1 : Temp2 := StrTofloat(Temp1)+StrTofloat(Edit1.text) ;
2 : Temp2 := StrTofloat(Temp1)-StrTofloat(Edit1.text) ;
3 : Temp2 := StrTofloat(Temp1)*StrTofloat(Edit1.text) ;
4 : begin
if StrTofloat(edit1.text)<>0 then Temp2 := StrTofloat(Temp1)/StrTofloat(Edit1.text)
else
begin
Edit1.Font.Color:=clLime;
showmessage('錯誤!除數不能夠為0!');
Edit1.Font.Color:=clblack;
end;
end;
else
Temp2:=StrToFloat(Edit1.text);
end;
except
ShowMessage('錯誤!您輸入的數據過大');
Form1.close;
end;
Temp1 := FloatToStr(Temp2);
if edit1.Font.Color=clblack then
begin
Temp1:=FloatToStr(Temp2);
Edit1.Text := Temp1;
flag1 := 5;
flag := 0;
flag3 := 0;
end ;
if edit1.Font.Color=clgreen then
begin
flag := 1;
flag1 := 5;
Edit1.Text := '+';
flag3 := 0;
end;
end;
end;
procere TForm1.SpeedButton19Click(Sender: TObject);
begin
Edit1.Font.Color := Clgreen;
if (edit1.Text<>'+') and (edit1.Text<>'-')and (edit1.Text<>'*') and (edit1.Text<>'/')and(edit1.text<>'')
then //當前裡面的字元為 + -* / 不能夠進行運算
begin
try
case flag of //切記case 不支持字元型
1 : Temp2 := StrTofloat(Temp1)+StrTofloat(Edit1.text) ;
2 : Temp2 := StrTofloat(Temp1)-StrTofloat(Edit1.text) ;
3 : Temp2 := StrTofloat(Temp1)*StrTofloat(Edit1.text) ;
4 :
begin
if StrTofloat(edit1.text)<>0 then Temp2 := StrTofloat(Temp1)/StrTofloat(Edit1.text)
else
begin
Edit1.Font.Color:=clLime;
showmessage('錯誤!除數不能夠為0!');
Edit1.Font.Color:=clblack;
end;
end;
else
Temp2:=StrToFloat(Edit1.text);
end;
except
ShowMessage('錯誤!您輸入的數據過大');
Form1.close;
end;
Temp1 := FloatToStr(Temp2);
if edit1.Font.Color=clblack then
begin
Temp1:=FloatToStr(Temp2);
Edit1.Text := Temp1;
flag1 := 5;
flag := 0;
flag3 := 0;
end ;
if edit1.Font.Color=clgreen then
begin
flag := 2;
flag1 := 5;
Edit1.Text := '-';
flag3 := 0;
end;
end;
end;
procere TForm1.SpeedButton11Click(Sender: TObject);
begin
Edit1.Font.Color:=Clgreen;
if (edit1.Text<>'+') and (edit1.Text<>'-')and (edit1.Text<>'*') and (edit1.Text<>'/')and(edit1.text<>'') then
begin
try
case flag of //切記case 不支持字元型
1 : Temp2 :=StrTofloat(Temp1)+StrTofloat(Edit1.text) ;
2 : Temp2 := StrTofloat(Temp1)-StrTofloat(Edit1.text) ;
3 : Temp2 := StrTofloat(Temp1)*StrTofloat(Edit1.text) ;
4 : begin
if StrTofloat(edit1.text)<>0 then Temp2:=StrTofloat(Temp1)/StrTofloat(Edit1.text)
else
begin
edit1.Font.Color:=clLime;
showmessage('錯誤!除數不能夠為0!');
edit1.Font.Color:=clblack;
end;
end;
else
Temp2 := StrToFloat(Edit1.text);
end;
except
ShowMessage('錯誤!您輸入的數據過大');
Form1.close;
end;
Temp1 := FloatToStr(Temp2);
if edit1.Font.Color=clblack then
begin
Temp1:=FloatToStr(Temp2);
Edit1.Text := Temp1;
flag1 := 5;
flag := 0;
flag3 := 0;
end ;
if edit1.Font.Color=clgreen then
begin
flag := 3;
flag1 := 5;
Edit1.Text := '*';
flag3 := 0;
end;
end;
end;
procere TForm1.SpeedButton18Click(Sender: TObject);
begin
Edit1.Font.Color := Clgreen;
if (edit1.Text<>'+') and (edit1.Text<>'-')and (edit1.Text<>'*') and (edit1.Text<>'/')
and (edit1.text<>'') then
begin
try
case flag of //切記case 不支持字元型
1 : Temp2 := StrTofloat(Temp1)+StrTofloat(Edit1.text) ;
2 : Temp2 := StrTofloat(Temp1)-StrTofloat(Edit1.text) ;
3 : Temp2 := StrTofloat(Temp1)*StrTofloat(Edit1.text) ;
4 : begin
if StrTofloat(edit1.text)<>0 then Temp2 := StrTofloat(Temp1)/StrTofloat(Edit1.text)
else
begin
edit1.Font.Color:=clLime;
showmessage('錯誤!除數不能夠為0!');
edit1.Font.Color:=clblack;
end;
end;
else
Temp2 := StrToFloat(Edit1.text);
end;
except
ShowMessage('錯誤!您輸入的數據過大');
Form1.close;
end;
Temp1 := FloatToStr(Temp2);
if edit1.Font.Color=clblack then
begin
Temp1:=FloatToStr(Temp2);
Edit1.Text := Temp1;
flag1 := 5;
flag := 0;
flag3 := 0;
end ;
if edit1.Font.Color=clgreen then
begin
flag := 4;
flag1 := 5;
Edit1.Text := '/';
flag3 := 0;
end;
end;
end;
procere TForm1.SpeedButton21Click(Sender: TObject);
begin
if messagedlg('是否退出?',mtconfirmation,[Mbyes,Mbno],0) = mryes then
close;
end;
procere TForm1.SpeedButton16Click(Sender: TObject);
begin
if flag1<>5 then
begin
try
case flag of //切記case 不支持字元型
1 : Temp2 := StrTofloat(Temp1)+StrTofloat(Edit1.text) ;
2 : Temp2 := StrTofloat(Temp1)-StrTofloat(Edit1.text) ;
3 : Temp2 := StrTofloat(Temp1)*StrTofloat(Edit1.text) ;
4 : begin
if StrTofloat(edit1.text)<>0 then Temp2:=StrTofloat(Temp1)/StrTofloat(Edit1.text)
else
begin
Edit1.Font.Color:=ClLime;
showmessage('錯誤!除數不能夠為0!');
end;
end;
else
Temp2:=StrToFloat(Edit1.Text); //如果直接按=號，那麼顯示第一個數
//即把第一個數賦給第二個數
end;
except
ShowMessage('錯誤!您輸入的數據過大');
Form1.close;
end;
flag:=0;
if Edit1.Font.Color=ClLime then Edit1.Font.Color := clBlack
else Edit1.Font.Color := clred ;
Edit1.Text:=FloatToStr(Temp2);
end;
flag1 := 5;
flag3 := 0;
end;
procere TForm1.N1Click(Sender: TObject);
begin
SpeedButton20.Caption := '打開';
N3.Caption := '狀態/on'
end;
procere TForm1.SpeedButton22Click(Sender: TObject);
begin
Edit1.Font.Color := ClBlack;
if flag1 = 5 then //出現結果指點點小數點 會置0，避免這個情況先清空
// 然後設置 flag1:=0; 這樣數字可以跟著後面輸入
begin
Edit1.Text := '';
flag1 := 0;
end;
if (SpeedButton20.Caption='打開') and ( flag3=0) then
begin
if Edit1.Text = '' then
Edit1.Text := '0'+'.'+Edit1.text //如果直接點小數點的BUTTON 則在前面加0
else
Edit1.Text := Edit1.text+'.';
end;
Inc(flag3,1); //統計小數、點的個數
// 注意可以用inc(flag3,1)每次 加1 inc(flag3,1)每次加5
//Dec (flag,1)是減減1
end;
procere TForm1.N2Click(Sender: TObject);
begin
SpeedButton20.Caption := '關閉' ;
N3.Caption := '狀態/off';
end;
procere TForm1.FormCreate(Sender: TObject);
begin
N3.Caption := '狀態/on';
flag1:=5;
end;
procere TForm1.N4Click(Sender: TObject);
begin
close;
end;
procere TForm1.Edit1KeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
if key = VK_RETURN then SpeedButton16.Click; // VK_RETURN為ENTER的虛擬值
//還有其他方法可以實現
end;
procere TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
case key of
'1' : SpeedButton1.Click;
'2' : SpeedButton2.Click;
'3' : SpeedButton3.Click;
'4' : SpeedButton4.Click;
'5' : SpeedButton6.Click;
'6' : SpeedButton7.Click;
'7' : SpeedButton13.Click;
'8' : SpeedButton12.Click;
'9' : SpeedButton14.Click;
'0' : SpeedButton15.Click;
'.' : SpeedButton22.Click;
'+' : SpeedButton5.Click;
'-' : SpeedButton19.Click;
'*' : SpeedButton11.Click;
'/' : SpeedButton18.Click;
end;
end;
end.