C中的变量名 [英] Variable names in C

问题描述

在预处理器中，我们可以在宏之间切换，如

In preprocessors, we can have switch between macros like,

#define BUFF(n) BUFF_##n

因此，BUFF(1) 将被 BUFF_1 替换，BUFF(2) 将被 BUFF_2 和歌曲替换

So, BUFF(1) would get replaced by BUFF_1, BUFF(2) would get replaced by BUFF_2 and song

这是否适用于 C 变量?即，动态地在相似变量之间进行选择.我知道这是一个奇怪的情况，可以使用数组或任何其他结构来处理.

Can this be applicable to C variables? i.e., choosing between similar variables dynamically. I understand it is a weird situation and can be handled using arrays or any other constructs.. but the situation demands me such situation.. could u plz help with this.. thanks in advance

推荐答案

是的，您可以使用该宏将 BUFF_ 应用于任何事物.预处理器将展开宏，然后编译器将尝试编译结果.后者可能会失败，因为如果你使用 BUFF(+) 你会得到 BUFF_+ 而这不是一个有效的变量名.

Yes, you can use that macro to apply BUFF_ to just anything. The preprocessor will expand macros and then the compiler will try to compile the result. The latter might fail, since if you use BUFF(+) you get BUFF_+ and that's not a valid variable name.

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