枚举中的元素数 [英] Number of elements in an enum

问题描述

在 C 中，是否有一种很好的方法来跟踪枚举中的元素数量?我见过

In C, is there a nice way to track the number of elements in an enum? I've seen

enum blah {
    FIRST,
    SECOND,
    THIRD,
    LAST
};

但这仅在项目是连续的并且从零开始时才有效.

But this only works if the items are sequential and start at zero.

推荐答案

我不相信有.但是，如果它们不是连续的，并且您还没有在某处列出它们的列表，您会如何处理这样的数字?如果它们是连续的但从不同的数字开始，你总是可以这样做:

I don't believe there is. But what would you do with such a number if they are not sequential, and you don't already have a list of them somewhere? And if they are sequential but start at a different number, you could always do:

enum blah {
    FIRST = 128,
    SECOND,
    THIRD,
    END
};
const int blah_count = END - FIRST;

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