C++ #include guards

Question

SOLVED

What really helped me was that I could #include headers in the .cpp file with out causing the redefined error.

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I\'m new to C++ but I have some p

Answer 1

You have circular references here: Physics.h includes GameObject.h which includes Physics.h. Your class Physics uses GameObject* (pointer) type so you don't need to include GameObject.h in Physics.h but just use forward declaration - instead of

#include "GameObject.h" 

put

class GameObject;   

Furthermore, put guards in each header file.

Answer 2

Use include guards in ALL your header files. Since you are using Visual Studio you could use the #pragma once as the first preprocessor definition in all your headers.

However I suggest to use the classical approach:

#ifndef CLASS_NAME_H_
#define CLASS_NAME_H_

// Header code here

#endif //CLASS_NAME_H_

Second read about forward declaration and apply it.