Thread: need help with handelling multiple source files

Sorry I'm not too bright, but I need some help here:

Im trying to split up my code, by includding different header and cpp files, but it give me errors like this:

Code:

1>colorIt.obj : error LNK2005: "void __cdecl blue_grey(void)" (?blue_grey@@YAXXZ) already defined in cosmosII_client.obj

This is my delcaration in main.cpp:

Code:

#include "global.h"
#include "colorIt.cpp"

colorIt.cpp:

#define _WIN32_WINNT WINVER

#ifdef WIN32
#endif

// INTERFACE FUNCTIONS:
// font colors>>

Code:

void tred()
{
	#ifdef WIN32
		HANDLE hstdo;
		hstdo = GetStdHandle(STD_OUTPUT_HANDLE);
		SetConsoleTextAttribute(hstdo, FOREGROUND_RED);
	#endif   
}

Help me make it so the files work. One time I tryed it a different way, and it compiled, but it didnt print any console colorS!