#include <string>
#include <iostream>
using namespace std;
//定义接口
class Interface
{
public:virtual void Request()=0;
};
//真实类
class RealClass : public Interface
{
public:virtual void Request(){cout<<"真实的请求"<<endl;}
};
//代理类
class ProxyClass : public Interface
{
private:RealClass* m_realClass;
public:virtual void Request(){m_realClass= new RealClass();m_realClass->Request();delete m_realClass;}
};客户端：
int main()
{ProxyClass* test=new ProxyClass();test->Request();return 0;
}

#include <iostream>
using namespace std;/*
subject（抽象主题角色）：真实主题与代理主题的共同接口。RealSubject（真实主题角色）：定义了代理角色所代表的真实对象。 Proxy（代理主题角色）：含有对真实主题角色的引用，代理角色通常在将客户端调用传递给真是主题对象之前或者之后执行某些操作，而不是单纯返回真实的对象。提示：a中包含b类；a、b类实现协议类protocol */class  Subject
{
public:virtual void SaleBook() = 0;
protected:
private:
};class  RealSubject : public Subject
{
public:virtual void SaleBook(){cout << "实体店买书....\n";}
protected:
private:
};class  ProxyTaoBao : public Subject
{
public:virtual void SaleBook(){//Double11();RealSubject rs;rs.SaleBook();Double11();}void Double11(){cout << "Double11 打折 半价" << endl;}
protected:
private:
};class  ProxyTaoBao2 : public Subject
{
public:void SetRealSubject(RealSubject *rs){m_s = rs;}virtual void SaleBook(){Double11();m_s->SaleBook();}void Double11(){cout << "Double11 打折 半价" << endl;}
protected:
private:RealSubject *m_s;
};void main()
{ProxyTaoBao *ptb = new ProxyTaoBao;ptb->SaleBook();delete ptb;return ;
}

#include "iostream"
using namespace std;//a包含了一个类b，类b实现了某一个协议（一套接口）
class AppProtocol
{
public:virtual int ApplicationDidFinsh() = 0;
protected:
private:
};//协议实现类
class AppDelegate : public AppProtocol
{
public:AppDelegate(){;}virtual int ApplicationDidFinsh()  //cocos2dx函数的入口点{cout<<"ApplicationDidFinsh do...\n";return 0;}
};//Application是代理类，在代理类中包含一个真正的实体类
class Application
{
public:Application(){ap = NULL;}
public:void run(){ap = new AppDelegate();ap->ApplicationDidFinsh();delete ap;}
protected:
private:AppDelegate *ap;
};//好处：main函数不需要修改了。只需要修改协议实现类
void main()
{Application *app = new Application();app->run();if (app == NULL){free(app);}cout<<"hello..."<<endl;system("pause");
}