Thread: Multifile Programming

I am doing a multifile program. There are two files first.cpp and second.cpp that I would like to include in the main file main.cpp. I have first.h and second.h, that I include using

Code:

// in file main.cpp
#include "first.h"
#include "second.h"

The .h files look something like this:

Code:

// in files first.h and second.h
#ifndef __FIRST_H
#define __SECOND_H

int	init(void);

#endif

And in the files first.cpp and second.cpp, I have added the lines

Code:

// in files first.cpp and second.cpp
#include "first.h"
#include "second.h"

I use the Turbo C++ 3.0 compiler. I have set the include directory to the directory that contains the .h and .cpp files. I can compile successfully, but I can't link it. The error message is 'Undefined symbol init() in module main.cpp'. Please help.