C/C++宏串级联？
C/C++宏串级联？
提问于 2018-02-08 01:00:09
#define STR1 "s"
#define STR2 "1"
#define STR3 STR1 ## STR2是否有可能将STR 3==“S1”连接起来？
Stack Overflow用户
发布于 2018-02-08 10:45:28
尝试如下：
/*
* Concatenate preprocessor tokens A and B without expanding macro definitions
* (however, if invoked from a macro, macro arguments are expanded).
*/
#define PPCAT_NX(A, B) A ## B
/*
* Concatenate preprocessor tokens A and B after macro-expanding them.
*/
#define PPCAT(A, B) PPCAT_NX(A, B)宏：
/*
* Turn A into a string literal without expanding macro definitions
* (however, if invoked from a macro, macro arguments are expanded).
*/
#define STRINGIZE_NX(A) #A
/*
* Turn A into a string literal after macro-expanding it.
*/
#define STRINGIZE(A) STRINGIZE_NX(A)然后，
#define T1 s
#define T2 1
STRINGIZE(PPCAT(T1, T2)) // produces "s1"页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/-100003478
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