我怎么能使循环和改变number为字符串

how can i make the loop and change number to string

本文关键字：number 字符串 改变 怎么能 循环      更新时间：2023-10-16
#include <iostream>
#include <cstdlib>
using namespace std;
int main() {
    int number=0;
    cout<<"enter an number to cumpute";
    cin>>number;
    if(number=0)
        cout<<"0"<<endl;
    for(number>0;51>number;) {
        number--;   
        cout<<"=";
    }
    for(number>10;number%10==0;) {
        cout<<"|";
    }
    for(number>5;number%5==0;) {
        cout<<"+";
    }
    cout<<endl;
    system("PAUSE");
    return 0;
}

(我得到了Y.Daniel Liang的课本。)我找不到这样的东西)我不知道如何使这个循环工作，我尝试使用"while"，也不工作。我应该只是计算"="+"|"，或开始作为字符串。我希望输出是这样的。

BarPlot – A Simple Bar Graph Plotter:
Input a number in range [0 50] or a negative number to terminate:
| Enter Number: 6
| ====+> 6
| Enter Number: 12
| ====+====|=> 12
| Enter Number: 50
| ====+====|====+====|====+====|====+====|====+====> 50
| Enter Number: 53
| ERROR: 53 is not in acceptable range.
| Enter Number: 33
| ====+====|====+====|====+====|==> 33
| Enter Number: 0
| 0
| Enter Number: 5
| ====> 5
| Enter Number: -1
 ------------------------------------------------
BarPlot – End Plot by User Request

您不需要将数字转换为字符串来解决这个问题。对象cout可以同时打印数字和字符串，而不需要在它们之间进行强制转换。

//example  
int number = 1;  
string str = "hello;
char c = '!';
//print hello1!
cout << str << number << c;

这里有一个不需要将整型转换为字符串的解决方案。

#include <iostream>
#include <cstdlib>
using namespace std;
int main() {
    //output inital prompt
    cout << "BarPlot – A Simple Bar Graph Plotter:n";
    cout << "Input a number in range [0 50] or a negative number to terminate.nn";

    //read in input
    int number = 0;
    cout << "Enter Number: ";
    cin >> number;
    //continue asking for input until a negative number is given
    while (number >= 0){
     for (int i = 1; i < number; ++i){
         //special symbol every 10th char
         if (i % 10 == 0) cout << "|";
         //special symbol every 5th char
         else if (i % 5 == 0) cout << "+";
         //every other char
         else cout << "=";
     }
      //print 0 or the number with an arrow before it
      if (number == 0) cout << 0;
      else cout << "> " << number << "n";
      //re-ask for input
      cout << "nEnter Number: ";
      cin >> number;
    }
    //output ending message
    cout << "BarPlot – End Plot by User Requestn";
    return EXIT_SUCCESS;
}
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