enum GameState
{
	GAMESTATE_MENU  = 0,
	GAMESTATE_GAME,
	GAMESTATE_OPTIONS,
	GAMESTATE_QUIT,
	GAMESTATE_UNKNOWN 
}

// är typ samma som:

const int GAMESTATE_MENU = 0;
const int GAMESTATE_GAME = 1;
const int GAMESTATE_OPTIONS = 2;
const int GAMESTATE_QUIT = 3;
const int GAMESTATE_UNKNOWN = 4;

// Skillnad:
void SetGameState(GameState myState);

SetGameState(1); // <~~~ FEL!
SetGameState(GAMESTATE_GAME); // <~~~ korrekt