/**
 * @name 工厂方法模式
 * @brief: 将对象创建委托给子类
 * @note 场景：框架需要扩展多种类型对象（如 UI 控件、游戏角色)
 */

class Product {
public:
    virtual void use() = 0;
};

class ConcreteProductA : public Product {
    void use() override { /* 产品A的功能 */ }
};

class Creator {
public:
    virtual Product* createProduct() = 0;
};

class ConcreteCreatorA : public Creator {
    Product* createProduct() override {
        return new ConcreteProductA();
    }
};

// 使用
int main()
{
    Creator* creator = new ConcreteCreatorA();
    Product* product = creator->createProduct();
    product->use();
    return 0;
}