Question

game.h needs: - packet.h - socket.h  socket.h needs: - game.h 

The problem comes when I try to include socket.h into game.h, because socket.h has game.h included already. How do I solve these kind of problems?

Answer 1

The usual way, use #ifdef and #define in your header files

inside game.h:

#ifndef GAME_H #define GAME_H  .. rest of your header file here  #endif 

This way, the contents will be read multiple times, but only defined once.

Edit: Removed underscores at start and end of identifier per comments.