将switch语句案例分组在一起?

问题描述

我可能正在寻找一些东西，但是在C ++中是否有一种简单的方法可以将案例分组在一起，而不是将它们单独写出来?我记得基本可以做到:

I may be over looking something but is there a simple way in C++ to group cases together instead of writing them out individually? I remember in basic I could just do:

SELECT CASE Answer
CASE 1, 2, 3, 4

C ++中的示例(对于需要它的人):

Example in C++ (For those that need it):

#include <iostream.h>
#include <stdio.h>
int main()
{
   int Answer;
   cout << "How many cars do you have?";
   cin >> Answer;
   switch (Answer)
      {
      case 1:
      case 2:
      case 3:
      case 4:
         cout << "You need more cars. ";
         break;
      case 5:
      case 6:
      case 7:
      case 8:
         cout << "Now you need a house. ";
         break;
      default:
         cout << "What are you? A peace-loving hippie freak? ";
      }
      cout << "\nPress ENTER to continue... " << endl;
      getchar();
      return 0;
}

推荐答案

否，但是您可以使用 if - else if - else 链也能达到相同的结果:

No, but you can with an if-else if-else chain which achieves the same result:

if (answer >= 1 && answer <= 4)
  cout << "You need more cars.";
else if (answer <= 8)
  cout << "Now you need a house.";
else
  cout << "What are you? A peace-loving hippie freak?";

您可能还想通过引发异常来处理0辆汽车的情况，然后还要处理负数汽车的意外情况.

You may also want to handle the case of 0 cars and then also the unexpected case of a negative number of cars probably by throwing an exception.

PS:我将 Answer 重命名为 answer ，因为用大写字母开头的变量被认为是不好的风格.

PS: I've renamed Answer to answer as it's considered bad style to start variables with an uppercase letter.

请注意，诸如Python之类的脚本语言允许以[1、2、3、4] 语法提供漂亮的 if答案，这是一种灵活地实现所需内容的方法.

As a side note, scripting languages such as Python allow for the nice if answer in [1, 2, 3, 4] syntax which is a flexible way of achieving what you want.

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