C++输入和输出问题

C++ Input and Output problems

本文关键字：出问题 输出 输入 C++      更新时间：2023-10-16

我的问题是，当我编译和运行程序时，随着循环的继续，小时没有列出 1，2，3 的"小时"，而且每行的循环计算都相同。

这就是程序的样子http://postimg.org/image/htk194eah/

计算是错误的，小时假设为 1，2...5

我希望它看起来像这样http://postimg.org/image/pnkvab1j1/

这是我到目前为止所拥有的：

int main()
{
    // Variables 
    int speed; 
    int time; 
    int distance; 
    // Obtain the speed

    cout << "Please input the speed of the vehicle  " ;
        cin >> speed;
  while(speed < 0) // while statement  
  {
   cout << "Please refrain from using a negative number   ";
        cin >> speed;
  }
     cout << "Please enter the time, represented in hours, travelled" <<endl;
     cin >> time;
   // Obtain the time
       while(speed < 1) 
  {
       cout<< "Please use a number greater than 1 " <<endl;
       cin >> time;
  }  
    // Calculation
    distance = speed * time;
    cout << endl;
    cout << "Hour(s) " << "t" << "Distance Travelled" << endl;
    cout << "____________________________________________" << endl;
    // "for" Loop statement
    for(int count =1; count <= time; count++)
  {
        cout << " " << "tt" << speed*time << endl;
  }

system ("PAUSE");
return 0;
}

当您在 for 循环中打印时，速度 = 20 且时间 = 5 始终，因此它始终打印 100（在您给出的示例中）。

您希望打印速度*计数（在本例中）。

再次打印小时"，这是一个空字符串，您要打印计数。

cout << count << "tt" << speed*count << endl;

这是正确的程序。你的程序非常好。但是你有一个非常小的错误。 

#include<iostream.h>
    main()
    {
        // Variables 
        int speed; 
        int time; 
        int distance; 
        // Obtain the speed

        cout << "Please input the speed of the vehicle  " ;
        cin >> speed;
      while(speed < 0) // while statement  
      {
       cout << "Please refrain from using a negative number   ";
            cin >> speed;
      }
      cout << "Please enter the time, represented in hours, travelled ";
      cin >> time;
       // Obtain the time
           while(speed < 1) 
      {
           cout<< "Please use a number greater than 1 ";
           cin >> time;
      }  
        // Calculation

        cout << endl;
        cout << "Hour(s) " << "t" << "Distance Travelled" << endl;
        cout << "____________________________________________" << endl;
        // "for" Loop statement
        for(int count =1; count <= time; count++)
      {
            cout << count << "tt" << speed * count << endl;
      }

    system ("PAUSE");
    return 0;
    }
相关文章：