其条件为真在if语句 [英] which condition is true in an if statement

问题描述

说，我有一个如果语句，例如

say I have an if statement as such

if(condition1 || condition2 || condition3)
{
 //do something
}

是否有可能找出其中的3个条件是真实的，当我们进入循环？

Is it possible to find out which of the 3 conditions was true when we enter the loop?

推荐答案

是的，你可以逐个检查每一个都用一样的东西：

Yes, you can check each one individually with something like:

if(condition1 || condition2 || condition3) {
    if (condition1) { doSomethingOne(); }
    if (condition2) { doSomethingTwo(); }
    if (condition3) { doSomethingThree(); }
    doSomethingCommon();
}

当然假设条件是不太可能在临时改变（如与线程，中断或存储器映射的I / O，例如）。

assuming of course that the conditions aren't likely to change in the interim (such as with threading, interrupts or memory-mapped I/O, for example).

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