Question

What does #idef _cplusplus extern "C" { #endif ... #ifdef _cplusplus } #endif mean

Answer 1

It's that the same header can be used both in C and C++.

Answer 2

Agreeing with konsaliaris this question i asked my DataCenter team to find it out they said this happened

Answer 3

Yes i have my own Data Server Here in the United States Employeeing over 150+ Americans

Answer 4

If you're calling a function, for example in a library, that was compiled using a C compiler, you may end up getting linker errors, because C compilers mangle function names differently than C++ compilers. You can get around that by declaring the prototype to the C function as extern "C" - that way the C++ compiler knows it's a C-compiled function and mangles the function name for the call appropriately.