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Do While要求用户重复整个int主程序

do-while repeat program-entry-point user-interface c++

-5

Mike Ericson · 技术社区 · 11 年前

编程很新,我在网上找不到任何基本的解释,也找不到适合我需要的代码。我有一个相当长的程序(大约300行),它都能工作。这是给出一个想法的结构:

#include <iostream>   
#include <stdlib.h>    
#include <time.h>      
#include <vector>      
#include <algorithm>   

using namespace std;   

int main() 
{
      //code....

    { 
         //code... etc...
    }

}

我想请用户重复该程序。如果输入y,则重复int main,直到再次提出相同的重复问题。除此之外&书信电报;“例如,谢谢,再见”;

3 回复 | 直到 11 年前

user2970916 11 年前

#include <iostream>   
#include <stdlib.h>    
#include <time.h>      
#include <vector>      
#include <algorithm>   

//using namespace std;   <--- Don't use using namespace std, it pollutes the namespace

void repeat()
{
   //... code to repeat
}

int main() 
{
      //code....
    char answer;
    while((std::cin >> answer) != 'y')
    { 
        repeat();
    }
}

Sheryar Khan 6 年前

#include <iostream>
#include <conio.h>

using namespace std;

//Class
class DollarToRs {
  public:

      int Dollar;
      int Rs;
      int ToRs;
      ConversionToRs() {
      cout << "Enter the amount of Dollar: ";
      cin >> Dollar;
      ToRs = Dollar * 154;
      cout << "This is the total amount in PKR: " << ToRs <<endl;
      }

};

int main()
{
  //Dollar Convertion Function
  DollarToRs convert;
  convert.ConversionToRs();


  //For Repeating Program

  int repeat;
  int exit;

  cout << "To repeat program enter 1" <<endl;
  cin >> repeat;

  while (repeat == 1) {
    convert.ConversionToRs();
    cout << "To repeat program enter 1" <<endl;
    cin >> repeat;
  }
  exit =0;

  if (exit == 0) {

  }

  getch();
  return 0;
}

Emil Laine 11 年前

下面是一个简单解决方案的示例:

int main()
{
    for (;;) // "infinite" loop (while (true) is also possible)
    {
        // stuff to be repeated here

        cout << "Repeat? [y/n]" << endl;
        char answer;
        cin >> answer;
        if (answer == 'n')
            break; // exit loop
    }              // else repeat
    cout << "Thank you, goodbye" << endl;
}

还有一个:

int main()
{
    bool repeat = true;
    while (repeat)
    {
        // stuff to be repeated here

        cout << "Repeat? [y/n]" << endl;
        char answer;
        cin >> answer;
        repeat = answer == 'y';
    }
    cout << "Thank you, goodbye" << endl;
}

作为补充说明,不要这样做: #include <stdlib.h> .在C++中,应该使用 c 使用C头文件时使用前缀头文件名: #include <cstdlib> 和 #include <ctime> .