在枚举元素的数量 [英] Number of elements in an enum

问题描述

在C，有一个很好的方法来跟踪一个枚举元素的数量？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
};

但是，如果项目是连续的，从零开始这仅适用。

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

推荐答案

我不相信有。但是你会用这样的数字做，如果他们不连续的，而你还没有他们的名单的地方？如果他们是连续的，但在不同的数字开始，你总是可以做的：

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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