daoleno/extern "C" 的作用.md

## extern "C" 的作用.md

      
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              extern "C" 的作用.md
            
          
    To ensure that the names declared in that portion of code have C linkage, and thus C++ name mangling is not performed
#ifdef __cplusplus
extern "C" {
#endif

void *memset (void *, int, size_t);
char *strcat (char *, const char *);
int   strcmp (const char *, const char *);
char *strcpy (char *, const char *);

#ifdef __cplusplus
}
#endif