Thread: Can't include Classes(very strange)

You should not be including .cpp files...
include the .h files....

You don't have the h files? Well... create them...

To use multiple files you must have .h files and .cpp files

The h files is for all declarations that the cpp will need. The cpp will contain all the definitions of the functions. Any other files requiring use of these files require that you include the .h files not the cpp.

To further beat a horse in the bush...ahhem.. to death I mean...
-------------------------------------
//some.h file
#ifndef SOME_H
#define SOME_H

int add(a, b);

#endif
////////////////////
--------------------------------------
//some.cpp file

#include"some.h"

int add(a, b){ return a + b; }

-----------------------------------------
///test.cpp
#include <iostream.h>
#include "some.h"

void main( void )
{
cout << "Result of 2 + 2 " << add(2, 2) << endl;
}