How does extern "C" work in C++?

 

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  • What is the effect of extern “C” in C++? 12 answers

    • It's probably not like that, but more like: 

    #ifdef __cplusplus 
extern "C" {
#endif

//some includes or declarations

#ifdef __cplusplus 
}
#endif

    It tells the compiler to use C name mangling for whatever is declared inside the directives.

    The way you have it now: 

    #ifdef __cplusplus 
extern "C" {} 
#endif

    is just dead code.

    It is used to inform the compiler to disable C++ name mangling for the functions defined within the braces. http://en.wikipedia.org/wiki/Name_mangling

    Extern "C" - 通知编译器，指出的函数是用C风格编译的。

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