In your project file create folders ;
gui
start_menu
game
config
Then create source files in those directories;
gui/gui.agc
start_menu/menu.agc
game/gameplay.agc
config/config.agc
In your
main.agc source file add;
#include "gui/gui.agc"
#include "start_menu/menu.agc"
#include "game/gameplay.agc"
#include "config/config.agc"
you could also create the folders in a "include" folder in the same folder that contains your project and include them like so;
#include "../include/gui/gui.agc"
#include "../include/start_menu/menu.agc"
#include "../include/game/gameplay.agc"
#include "../include/config/config.agc"
That way you can share them among other projects