焦炭增量 [英] Incrementation of char

问题描述

我发现了一些问题，询问如何让字符'B'返回'C'，然后'D'等答案是相当复杂，大多只是矫枉过正。

I found some question asking how to let char 'B' to return 'C' and then 'D' etc. The answers were quite complex and mostly just overkill.

为什么不能简单地使用这样的：

Why not to use simply this:

char X='A';
X++

编辑：它从A到Z和下一步是什么？

It goes from A to Z and what next?

推荐答案

如果您满意，让结果，那么这很好。

If you're happy with the results that gives, then that's fine.

一般情况下，他们希望从Z到AA或类似的东西来包装，虽然 - 像Excel列。显然只是递增一个字符不会这么做的 - 它会去[

Usually when I've seen questions like that, they want to wrap from "Z" to "AA" or something like that that though - like Excel columns. Clearly just incrementing a char won't do that - it would go to '['.

另外，即使在单个字符，有效的值的范围可能是非-contiguous - 明显的例子是十六进制。如果你增加'9'你'：'而不是'A'或'A'，你可能想要的。所需的顺序是很少无论Unicode的给你。

Alternatively, even within a single character, the range of valid values may be non-contiguous - the obvious example being hex. If you increment '9' you get ':' instead of the 'a' or 'A' which you probably wanted. The desired order is rarely "whatever Unicode gives you".

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