设计模式代理模式实现C++

/*********************************
*设计模式--代理模式实现
*C++语言
*Author：WangYong
*Blog:http://www.cnblogs.com/newwy
********************************/
#include <iostream>
#include <iostream>
using namespace std;
class Subject
{
	public:
	virtual ~Subject(){}
	virtual void Request() = 0;
	protected:
	Subject(){}
};
class ConcreteSubject:public Subject
{
	public:
	ConcreteSubject(){}
	~ConcreteSubject(){}
	void Request(){cout<<"ConcreteSubject...request..."<<endl;}
};
class Proxy
{
	public:
	Proxy(){}
	Proxy(Subject *sub){_sub = sub;}
	~Proxy(){delete _sub;}
	void Request(){cout<<"Proxy request..."<<endl;_sub->Request();}
	private:
	Subject *_sub;
};
int main()
{
	Subject *sub = new ConcreteSubject();
	Proxy *p = new Proxy(sub);
	p->Request();
	return 0;
}