Quick, dirty alternative to RTTI

Entity.h

enum EntityType { EntityType_Entity = 0, EntityType_Player, EntityType_Enemy };

class Entity
{
public:
	Entity() : type(EntityType_Entity) {}
	
	// This would generally be private, with a public getter
	EntityType type;
};

class Player : public Entity
{
public:
	Player() : type(EntityType_Player) {}
};

class Enemy : public Entity
{
public:
	Enemy() : type(EntityType_Enemy) {}
};