Main virtual currency

1. About 11 km in 18 minutes | 14 traffic lights | smooth
taxi about 33 yuan | way: yuhangtang Road, Zijingang road

Wuchang (subway station)

yuhangtang road
3.7 km

Zijingang road
4.1 km

Xixi road
3 km

Lingyin road
285 m


Xihu Cultural Center

2.

It's convertible. Users get singing beans ring karaoke, and the gifts and singing coins they receive ring karaoke, challenge and live broadcast can be converted into singing beans for cash withdrawal. On August 18, 2017, the updated version v1.0.0 of kugou singing has the functions of sound effect, intelligent scoring, quality accompaniment, live broadcast of karaoke songs, competition judges and social interaction of karaoke songs. It has the characteristics of large repertoire of accompaniment songs and high sound quality

cool dog singing live function, users can use this function to live karaoke and interact with other users. The audience can see the songs that the anchor is singing in real time and ask for songs. This function enables users to get singing beans ring karaoke. Gifts and singing coins received by users ring karaoke, challenge and live broadcast can be converted into singing beans for cash withdrawal

extended information:

the biggest highlight of the update and upgrade of kugou app is the online withdrawal function of [karaoke] under the [singing] mole: the gifts obtained by users through kugou karaoke can be exchanged for cash online, which is also the first domestic karaoke proct to realize the withdrawal function

users receive gifts from fans, the system will automatically convert into singing beans according to the value of the singing currency. Users can convert the singing beans into singing coins and continue to consume on the platform. They can also convert the beans into money Alipay. p>

3. When do you want the exchange rate of Japanese currency to RMB?

on February 17, the middle price of RMB transaction was: 100 yen, 6.8307 yuan

in other words, 1RMB = 100 / 6.8307 = 14.63jpy

the real-time average market exchange rate as of February 17, 2006, 04:52:29 UTC
1.00 RMB = 4.03153 TWD

5. Just find out. Don't spend real money on it.

6. Should the payment system be highly centralized or completely distributed and decentralized? The hyperledger team believes that there should be a balance between the two - power is neither concentrated in one institution nor completely distributed, but reasonably and appropriately divided into several parts
decentralization, a political concept first proposed by the British philosopher John Locke, was used by hyperledger in the distribution of power in the payment system. As shown in the figure below, the first is the "centralized" network of general national and third-party payment systems, the third is the bitcoin type point-to-point "decentralized" network, and the second is the payment protocol system established by hyperledger
hyperledger is an open source platform that allows anyone to issue personal currency. Hyperledger open source payment protocol was first founded by Daniel Feichtinger from Hong Kong. He is the core developer of hyperledger and the inventor of distributed consensus mechanism. Dan o'prey, another member of hyperledger, joined in April as co-founder. Prior to that, o'prey founded a visible cloud computing tool, macdeyun. The company base is in Beijing to help developers use Amazon AWS more easily. It obtained $1.5 million from Sequoia Capital in the early stage. O'prey left his position as CEO three months ago. O'prey joined hyperledger in charge of marketing and business development. Currently, hyperledger's server and client code has been uploaded to GitHub
the proposal of hyperledger payment agreement is largely influenced by ripple. At the end of the Q & a page of the hyperledger website, the team said that hyperledger can be seen as an alternative or supplementary system to ripple
ripple is another promising digital currency after bitcoin. The biggest difference between ripple and bitcoin is that their logic is just the opposite. Bitcoin is first a digital currency, and then a means of payment based on it; Ripple's idea is to make payment easier. First of all, payment. In order to make payment more convenient and currency circulation, ripple created its own virtual currency XRP
in ripple payment network, you can transfer any currency, including US dollar, euro, RMB, Japanese yen or bitcoin, which is easy and fast. The transaction confirmation is completed within a few seconds, and the transaction cost is almost zero. There is no so-called cross-bank and cross-border payment fee
compared with bitcoin, the account book needs six confirmations, 10 minutes each time, and the total confirmation time is nearly one hour. Ripple introces a "consensus" mechanism, which can verify and confirm the transaction in a very short time through the voting of special nodes. Ripple's trade confirmation process can be completed in seconds. Hyperledger is similar to ripple "consensus" mechanism, and the consensus is reached through Byzantine fault-tolerant algorithm mechanism
in addition, the ripple client does not need to download the blockchain (recording historical transaction data), it abandons the verified general ledger chain on the ordinary node, and only keeps the latest verified general ledger and a link to the historical general ledger, so the workload of synchronizing and downloading the general ledger is very small
the increasing volume of blockchain has become another big problem of bitcoin. Every time bitcoin wallet is installed, a lot of time is consumed to download data blocks. In the past year, with the increase in the number of transactions, especially the emergence of a large number of small transactions on gambling websites, the volume of block ring chain has doubled to 15GB
at the same time, under the general ledger and consensus mechanism, yingyunsheng ripple also has an absolutely accurate online IOU marking function, which hides a subversive idea that users can issue their own currency. Users can set the name of the IOU and the exchange ratio with us dollars or bitcoin. This is actually "personal currency". Its core is to subvert the currency with government credit as the core, and give users the choice of every trust
long verification time, growing block chain (recording historical transaction data) and increasing unreliable transactions are the problems bitcoin is facing now. These are also the problems hyperledger tries to solve. Hyperledger inherits the advantages of ripple. By introcing a consensus mechanism similar to ripple, it can shorten the verification time, remove the block ring chain, and use the voting mechanism (two-thirds agree) to automatically detect and remove the damaged nodes through transaction requirements
the concept of ripple appeared as early as 2004, and Ryan Fugger launched the first implementation version of ripple. Its goal is to build a decentralized virtual currency system that allows anyone to create their own currency. Money in ripple network is expressed as "debt", and all transactions show the change of account balance
the original intention of ripple project is to establish a distributed P2P clearing network: everyone is their own bank, which can issue and accept loans, and at the same time act as a lending channel (for example, a wants to borrow money from B, but they don't know each other, but they all know C, so C can act as a channel for a and B. C first borrows money from B, and then lends money to a, indirectly realizing that a borrows money from b)
ripple's design idea is based on acquaintance relationship and trust chain. If a person wants to use ripple network for remittance or loan, the premise is that his friends already exist in the network. Otherwise, it is impossible to establish a trust chain between the user and other users, so there are not many ripple users
the problem of limited users in small circles has been solved after the establishment of the new company opencoin. Opencoin has launched a new version of ripple, which introces two measures to solve the problem of isolated small circle: one is to launch ripple currency, XRP, as the base currency of ripple network, which can circulate in the whole network just like bitcoin, without being limited to the circle of acquaintances; The other is the introction of gateway system, which is similar to currency exchange institutions, allowing people to inject legal money into and withdraw from the ripple network, and can act as a bridge between borrowers and borrowers
What are the differences between hyperledger and ripple
according to the statement given by the hyperledger team:
? In concept, ripple focuses on forming a trust chain according to the reputation of the entity, and finding the simplest way to realize the transaction, which can be cross currency. The purpose of hyperledger is to make it easy for private entities to issue money and to have precise control over the amount of money issued< br />? Ripple and hyperledger share the same "consensus" mechanism and attach the same protocol, but the rules of membership and privacy are different< br />? Hyperledger does not issue a currency of its own in the system< At present, ripple's commercial business can be divided into two types:
one is that ripple directly provides remittance technology and underlying protocol to banking financial institutions, which is equivalent to replacing the original high-cost swift technology. Ripple only serves as the technology provider. Users can open the client of China Merchants Bank and choose to remit by swift or ripple in the remittance column, The significance of ripple is to use technological innovation to help banks rece costs
the other is direct consumer oriented business. Users can log in to ripple's website or download an app of ripple wallet, where they can freely make cross-border remittance, charge accounts or exchange between real currency and virtual currency. The network management can be a bank, a third-party payment enterprise, or even an indivial
how to participate in hyperledger? Its consensus pool is divided into four parts: testpool, mainpool, custompool and premierpool< br />? Testpool is open to everyone for free, in which you can publish your personal ledger (currency) or test third-party applications, or even try to attack the payment system and do what you want to do< br />? Mainpool is the basic pool. Each node in the pool requires a unique domain name and SSL certificate. Now it is added to the mailing list and will be notified as soon as hyperledger is released< br />? Custompool allows users to define pools, which can be limited to a country, a university, etc< br />? Premier pool is a commercial pool. There are more strict restrictions and requirements for operating a "consensus" node. Every request for ledger must be audited, and membership subscription fees must be paid. Specific rules need to be communicated with hyperledger team.

7. Because the title says to use the least number of sheets to express, that means to use more than 100 yuan, less than 100 but more than 50 yuan with 50 yuan, and so on< br />#include
void main()
{int a,i,j,k,n,m,s;// I is the number of paper with 100 yuan, j is the number of paper with 50 yuan, K is the number of paper with 20 yuan, n is the number of paper with 10 yuan, M is the number of paper with 5 yuan, and S is the total number of sheets< br />printf" Please enter a number: & quot;)< br />scanf("% d",& a); // Assign the input number to a< br />32785%100=i;< br />85%50=j;< br />35%20=k;< br />15%10=n;< br />5%5=m;< br />s=i+j+k+m+n;< br />printf("% d", s);< br />}

8. There are a lot of money exchange stalls in airports, banks and urban areas. Many money changers don't accept the exchange rate in RMB or the exchange rate given is very poor. It is suggested to use US dollars for exchange. It is not recommended to exchange at the airport and the bank, so the exchange rate loss is large. It can be exchanged at a stall in the city. According to the amount of exchange, you can bargain and try to rely on the official exchange rate at that time. Convenient exchange points are concentrated in the area of main bazaar and Connaught square.

9. Character encoding is a bit complicated. The most we learn is ASCII code, but ASCII can only encode 128 characters (the extended character set is 256). These characters are far from enough. Therefore, many standards have been formulated to encode various characters, such as ANSI standard, GBK (national standard), ISO standard, etc, For details, please refer to:
http://wenku..com/view/057cb193daef5ef7ba0d3c95.html

specifically, let's see what's going on:
first of all, you can try to run the following program to see the result:
? Include & lt; stdio.h>< br />void main()
{
int a,b;< br /> a = (int)" ￥";< br /> printf(" a=%d\ n", a); < br /> printf(" a=%s\ n", 4198928);< br />
b = (int)'$&# 39;;< br /> printf(" b=%d\ n", b);< br /> printf(" b=%c\ n", 36);
}
then let's analyze:
in the computer, en, in the memory, all the data (including all kinds of characters) are 0 and 1 (binary), that is to say, our "￥" character is also a number (a string of 0 and 1) in the memory. What is the number
through the above program, we can clearly see that the number is 4198928 (decimal expression)
of course, why 4198928? This is the problem of coding standard It's too long to explain the coding standard in detail). The coding standard determines that the "￥" character (multi byte character) is stored in the computer memory according to 4198928. Of course, the 4198928 read from the memory will also be translated into "￥"

in addition, you don't seem to know the meaning of% D,% C,% s, so you're going to read a book. There must be a chapter about explaining the printf function in any C language basic course.

10. I'm sorry. stdio.h>< br />main()
{
int x,y,z,s,num=0;// x,y,z[UNK][UNK][UNK]示5元[UNK]2元[UNK]1元[UNK][UNK]数
printf(" 请输[UNK][UNK]兑换[UNK]钱数& quot;);< br /> scanf("% d"," s);< br /> for(x=1; x< 11? x++)
for(y=1; y< 26? y++)
for(z=1; z< 51? z++)
{
if((5*x+2*y+z)==s) in a++;< br /> // printf(" 五元 25968; d[UNK] 20803;[UNK] 25968;d[UNK] 20803;[UNK] 25968;d\ n," x,y,z);< br /> }
printf(" [UNK] n", num);< br />
}