/**
 * @name 抽象工厂模式
 * @brief: 创建相关对象族
 * @note 场景：跨平台UI组件库（如 Windows/macOS 按钮+文本框组合）
 */

class Button {
public:
    virtual void render() = 0;
};
class WinButton : public Button {
public:
    void render() override {}
};
class MacButton : public Button {
public:
    void render() override {}
};

class GUIFactory {
public:
    virtual Button* createButton() = 0;
};
class WinFactory : public GUIFactory {
    Button* createButton() override { return new WinButton(); }
};
class MacFactory : public GUIFactory {
    Button* createButton() override { return new MacButton(); }
};

int main()
{
    // 使用
    GUIFactory* factory = new WinFactory(); // 根据配置切换
    Button* btn = factory->createButton();
    btn->render();
    return 0;
}