c++设计模式之装饰模式

装饰器模式

动态地给一个对象添加一些额外的工作职责，就增加功能来说，装饰器模式比继承的子类更灵活。

装饰模式的类结构图：

兑现代码：

#include <string>#include <iostream>using namespace std;class Car{public:virtual void showcar()=0;};class RunCar:public Car{public:void showcar(){cout<<"Run..."<<endl;}};class SwimCarDe:public Car{public:SwimCarDe(Car*car){m_car=car;}void showcar(){m_car->showcar();cout<<"swim..."<<endl;}private:Car *m_car;};class FlyCarDe:public Car{public:FlyCarDe(Car*car){m_car=car;}void showcar(){m_car->showcar();cout<<"fly..."<<endl;}private:Car *m_car;};void main04(){Car *c = NULL;c = new RunCar();c->showcar();/*SwimCarDe*sc =new SwimCarDe(c);sc->showcar();*/SwimCarDe *sc =new SwimCarDe(c);sc->showcar();FlyCarDe *fc =new FlyCarDe(sc);fc->showcar();/*别忘了释放对象*/delete fc;delete sc;delete c;cout<<"nihao..."<<endl;system("pause");return ;}