在C ++中在Switch-Case中执行OR [英] Do an OR in Switch-Case in C++

问题描述

如何在C ++中做到这一点？例如，如果用户按ESC或'q'或'Q'，我将尝试触发程序退出。

How would you do this in C++? For example I'm trying to trigger a program exit both if the user presses ESC or 'q' or 'Q'.

我试图查找它，但是我在C ++中没有找到它的语法。我知道如何做它与if-else，但是它是可能的开关case？当然，我可以只是做一个函数，并从两个单独的情况下调用它，但有一个方法来做它只是通过组合case语句？

I've tried looking for it, but I found no syntax for it in C++. I know how to do it with if-else, but is it possible with switch - case? Of course I can just make a function and call it from two separate case, but is there a way to do it just by combined case statement?

例如，这就是我'm寻找（当然不工作）：

For example that's what I'm looking for (of course not working):

void keyboard( unsigned char key, int x, int y )
{
    switch( key )
    {
        case ( 27 || 'q' || 'Q' ):
            exit( 0 );
            break;

        case 'a': ...

                case 'b': ...
    }
}

推荐答案

案例没有中断：

case  27: //could be 27
case 'q': //could be 27 or 'q'
case 'Q': //could be 27, 'q', or 'Q'
    exit(0);
    break;

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