工厂模式简述

class Game {
public:
	Game() {}
	virtual ~Game() {}
	virtual void Play() {
		std::cout << "play game" << std::endl;
	}
};

class BasketBall : public Game {
	void Play() override { std::cout << "play basketball" << std::endl; }
};

class SocketBall : public Game {
	void Play() override { std::cout << "play socketball" << std::endl; }
};



class GameFactory {
public:
	GameFactory() {}
	virtual ~GameFactory() {}
	virtual Game* CreateGame() = 0;
};

class BasketBallFactory : public GameFactory {
public:
	Game* CreateGame() override {
		return new BasketBall();
	};
};

class SocketBallFactory : public GameFactory {
public:
	Game* CreateGame() override {
		return new SocketBall();   
	};
};

int main() {
	GameFactory* factory = new BasketBallFactory();
	Game* game = factory->CreateGame();  // 指向BasketBall
	game->Play();
	delete factory;
	delete game;
	factory = new SocketBallFactory();
	game = factory->CreateGame();
	game->Play();
	delete factory;
	delete game;
	return 0;
}