_countof() 宏引申出來的語法知識

ref://https://blog.csdn.net/nanhaizhixin/article/details/7325529   stdlib.h裏有一個宏_countof，如下： extern "C++" { template <typename _CountofType, size_t _SizeOfArray> char (*__countof_helper(UNALIGNED _Cou

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