继续使用在switch语句 [英] Using continue in a switch statement

问题描述

我想从开关语句的中间跳，到循环语句在以下code：

I want to jump from the middle of a switch statement, to the loop statement in the following code:

while (something = get_something())
{
    switch (something)
    {
    case A:
    case B:
        break;
    default:
        // get another something and try again
        continue;
    }
    // do something for a handled something
    do_something();
}

这是使用继续有效的方式？是继续按开关语句忽略报表？难道C和C ++在这里他们的行为有什么不同？

Is this a valid way to use continue? Are continue statements ignored by switch statements? Do C and C++ differ on their behaviour here?

推荐答案

这是精细，继续语句涉及封闭的循环，你的code应该相当于（避免此类跳转语句）：

It's fine, the continue statement relates to the enclosing loop, and your code should be equivalent to (avoiding such jump statements):

while (something = get_something()) {
    if (something == A || something == B)
        do_something();
}

但是，如果你希望破来退出循环，因为您的评论建议（它总是与其他东西再次尝试，直到它计算为false），则需要不同的结构。

But if you expect break to exit the loop, as your comment suggest (it always tries again with another something, until it evaluates to false), you'll need a different structure.

例如：

do {
    something = get_something();
} while (!(something == A || something == B));
do_something();

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