设计模式之装饰模式

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#include "stdafx.h" #include <iostream> #include <string>   using namespace std;   /************************************* 装饰模式 *************************************/   class Person { public:     Person(){}     Person(string strName) :name_(strName) {}     virtual void Show() {         cout << " 装饰的 "<< name_ << endl;     } private:     Person(const Person& p);     string name_; };   /* 抽象 装饰 */   class Finery :public Person{ public:     Finery():p_(NULL){}     void Decorate(Person* p){         p_ = p;     }       void Show() {         if (p_) {             p_->Show();         }     } protected:     Person* p_; }; /* 具体装饰 */ class TShirts :public Finery { public:     void Show() {         cout << "T恤衫" << " ";         Finery::Show();     } };   /* 具体装饰 */ class BigTrousers :public Finery { public:     void Show() {         cout << "大垮裤" << " ";         Finery::Show();     } };   class LeatherShoes : public Finery{ public:     void Show()     {         std::cout << "皮鞋" << " ";         Finery::Show();     } };     int main() {     Person* p = new Person("行人");     TShirts* pts = new TShirts();     BigTrousers* pbt = new BigTrousers();     LeatherShoes* pls = new LeatherShoes();     pts->Decorate(p);     pbt->Decorate(pts);     pls->Decorate(pbt);     pls->Show();<br>       return 0; }

为一个类添加额外的功能装饰

参考 大话设计模式