如何从程序开始 [英] How to start from beginning of the program

问题描述

我是C ++的初学者.我只是在学习这种语言的abc.我创建了一个小程序，该程序将添加:

I am a very beginner in c++. i am just learning abc of this language.. i created this small program that would add:

#include <iostream>
   using namespace std;

float add(float a, float b){
              return a+b;  
      }

int main(){

    float num1;
    float num2;    

    cout<<"add...enter digits \n";
    cout<<"first digit: ";
    cin>>num1;
    cout<<"\n Second number: ";
    cin>>num2;

    cout<< "your sum is: "<<add(num1, num2)<<endl; 




    system("pause");    
}

以上代码是我对c ++的第一个可用的应用程序

this above code is my very first usable application of c++

现在我希望当某个人想要再次添加时，该程序再次启动...我想到了使用循环，但我却不知道如何使用这种方式.我的意思是我应该使用什么条件.

now i wanted that when some one wants to again add then this program starts again... i thoughts of using loops, i but cannot think how to use in such a way. i mean what conditions i should use.

请告诉我

谢谢.

推荐答案

以下代码将做到这一点:

The following code will do that:

    #include <iostream>
    using namespace std;

    float add(float a, float b){
            return a+b;  
    }

    int main(){

    float num1;
    float num2;    


    while( true ){

      cout<<"add...enter digits \n";
      cout<<"first digit: ";
      cin>>num1;
      cout<<"\n Second number: ";
      cin>>num2;

      cout<< "your sum is: "<<add(num1, num2)<<endl; 
    }


    system("pause");    
}

以上代码将永远运行.如果要给用户一个选择，请应用循环中断条件.

above code will run forever. If you want to give user a choice, then apply a loop break condition.

  char repeat = 'y';
  while( repeat == 'y'){

  // do as previous

  //.....

 //finally give user a choice

  cout<< "Do you want to repeat?(y/n):";
  cin>> repeat;
  }


    system("pause");    
}

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