Thread: Extern functions?

Hi all,
I have these .CPP files ("Main.cpp" and "RandomFunction.cpp"):

Code:

/*
 * "Main.cpp"
 */

#include "RandomFunction.cpp"

int main()
{
    randomFunction();
}

Code:

/*
 * "RandomFunction.cpp"
 */

void randomFunction()
{
    // Do some stuff
}

But when I launch the program, the compiler gives me a linker error: "RandomFunction.obj : error LNK2005: "void __cdecl randomFunction(void)" (?randomFunction@@YAXXZ) already defined in Main.obj"

So how should I rewrite the code to fix the linker error (I think I should define somewhere the extern function)?


Thanks.

Petike

You don't include .cpp files. You include .h files (which should just contain the prototype of the function, not the function itself).

Aha, so .CPP files should NEVER be included.

Now I can place the function prototype in some header file, let's say "RandomFunction.h".
But where can I place the WHOLE DEFINITION of that function? Because I don't want to have it in the "Main.cpp" file. Could you please write here the code?

Thanks

Petike

Originally Posted by Petike

Aha, so .CPP files should NEVER be included.

Now I can place the function prototype in some header file, let's say "RandomFunction.h".
But where can I place the WHOLE DEFINITION of that function? Because I don't want to have it in the "Main.cpp" file. Could you please write here the code?

Thanks

Petike

in RandomFunction.cpp, just like you have it now.

OK,
Thanks you very much.

Petike

Hi again,
I would have one more question:
Should I use in the "RandomFunction.cpp" also the #include "RandomFunction.h" directive or it will be enough to use it just in the "Main.cpp" file?

All right,
Thanks

Petike