Question

我创建了这个小软件，可以计算矩形和正方形的表面和周长。但是，我很难运行这个程序。我的意思是，当我尝试运行它时，该软件适用于＆＃34; square＆＃34;部分，但当我进入＆＃34;矩形＆＃34;它会立即关闭。部分。谁能帮我？非常感谢你！

#include<iostream>
using namespace std;
int main ()
{
double a, b, c, answer, x, y, z;
cout << "Square (1) or rectangle (2) ";
cin >> x ;
if (x==1)
{
    cout << "Square side:  ";
    cin >> a;
    cout << " Type (2) if you would like to calculate the Perimeter or (1) if you would like to calculate the surface?";
    cin >> y;
    if (y == 1)
    {
        cout<<"The surface of the square is: ";
        answer = ( a * a );
        cout << answer << endl;
    }
    else if (y == 2)
    { 
        cout << "The perimeter of the square is: ";
        answer = (4*a);
        cout << answer << endl;
     }     
else if (x==2)
{
     cout << "The first side of the rectangle is: ";
     cin >> c;
     cout << "The second side of the rectangle is: ";
     cin >> b;
     cout << " Type (2) if you would like to calculate the Perimeter or (1) if you would like to calculate the surface? ";
     cin >> z;
     if (z == 1)
     {
         cout << "The surface of the rectangle is: ";
         answer = (c*b);
         cout << answer<<endl;
      }
      else if (z == 2)
      { 
          cout << "The perimeter of the rectangle is: ";
          answer = 2 * (c + b);
          cout << answer << endl;
       }
   }
   system("pause");
   return 0;
}

Answer 1

您在else if (x==2)

之前缺少一个结束括号

最好让缩进与大括号相匹配 - 更容易发现这种类型的错误 `

Answer 2

你错放了一个大括号（}）。您需要在else if (x==2)之前关闭它，否则其他地方如果适用于else if (y==2)而不是x == 1.改进您的代码风格，如IntermediateHacker评论所指出的那样，您应该能够避免这样的错误。

Answer 3

我花了很多时间格式化你的代码。它仍有明显的问题。花括号只是不匹配。你甚至没有主方法的开括号。你在else if (x==2)之前也没有大括号。如果您付出了更多努力来格式化代码，那么您将更容易发现问题。

C ++编程......如果...条件，就会卡在if..else上

3 个答案: