Why do many header files have “#ifdef __cplusplus” and “extern “C” { “?
#ifdef __cplusplus extern “C” { #endif //all of the code of a long header file goes here #ifdef __cplusplus } #endif if __cplusplus is defined, we are compiling C++ code extern “C” makes the compiler simply compile C code for example, if we used a namespace for the C code, the C code wouldn’t get a namespace since we told the compiler we only want fast C code.
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