代理模式通常找到代理方来管理用户的权限访问。如下图：

#include<string>
#include<iostream>
using namespace std;
class Video
{
public:
	virtual void  Free() = 0;
	virtual void VIP() = 0;
	virtual void  Ticket() = 0;
};
class  FixbugVideo:public Video
{
public:
	virtual void  Free() { cout << "free" << endl; }
	virtual void VIP() { cout << "VIP" << endl; }
	virtual void  Ticket() { cout << "Ticket" << endl; }
};
class FreeProxy :public Video
{
private:Video* v;
public:
	FreeProxy()
	{
		v = new FixbugVideo();
	}
	
	virtual void  Free() { v->Free(); }
	virtual void VIP() { cout << "无权限VIP" << endl; }
	virtual void  Ticket() { cout << "无权限Ticket" << endl; }
};

class VIPProxy :public Video
{
private:Video* v;
public:
	VIPProxy()
	{
		v = new FixbugVideo();
	}
	virtual void  Free() { v->Free(); }
	virtual void VIP() { v->VIP(); }
	virtual void  Ticket() { cout << "无权限Ticket" << endl; }
};


class TicketProxy :public Video
{
private:Video* v;
public:
	TicketProxy()
	{
		v = new FixbugVideo();
	}

	virtual void  Free() { v->Free(); }
	virtual void VIP() { v->VIP(); }
	virtual void  Ticket() { v->Ticket();}
};
void Look(Video* p)
{
	p->Free();
	p->Ticket();
	p->VIP();
}
int main()
{
	Video* v = new FreeProxy();
	Video* v1 = new VIPProxy();
	Video* v3 = new TicketProxy();
	Look(v);
	Look(v1);
	Look(v3);
}