设计模式实现(八): Decorator Pattern

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原创最新推荐文章于 2026-06-15 12:12:59 发布 345 阅读 AI 写同款· GEO 优化 ›

装饰器设计模式（Decorator Pattern）详解动态地给一个对象添加一些额外的职责，就增加功能来说，装饰器模式比生成子类更为灵活。，而无需修改其原始类。的方式提供灵活的扩展功能替代继承。阅读详情

#include "stdafx.h" #include <iostream> class CComponent { public: virtual ~CComponent() {} public: virtual void Print() = 0; }; class CConcrete : public CComponent { public: virtual void Print() { std::cout << "Concrete class" << std::endl; } }; class CDecoratorA : public CComponent { public: CDecoratorA(CComponent* pComponent) : m_pComponent(pComponent) { } public: virtual void Print() { if (m_pComponent) m_pComponent->Print(); std::cout << "DecoratorA" << std::endl; } private: CComponent* m_pComponent; }; class CDecoratorB : public CComponent { public: CDecoratorB(CComponent* pComponent) : m_pComponent(pComponent) { } public: virtual void Print() { if (m_pComponent) m_pComponent->Print(); std::cout << "DecoratorB" << std::endl; } private: CComponent* m_pComponent; }; class CDecoratorC : public CComponent { public: CDecoratorC(CComponent* pComponent) : m_pComponent(pComponent) { } public: virtual void Print() { if (m_pComponent) m_pComponent->Print(); std::cout << "DecoratorB" << std::endl; } private: CComponent* m_pComponent; }; int _tmain(int argc, TCHAR argv[]) { CConcrete obj; CDecoratorA da(&obj); CDecoratorB db(&da); CDecoratorC dc(&db); dc.Print(); return 0; }

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