设计模式学习之----代理模式

　　为其他对象提供一种代理以控制对这个对象的访问

#include <iostream>
#include <string>
#include <list>

using namespace std;
class Subject
{
public:
    virtual void sailbook() = 0;
};

class RealSubjectBook : public Subject
{
public:
    virtual void sailbook()
    {
        cout << "Real sail book!" << endl;
    }
};

class dangdangProxy : public Subject
{
public:
    virtual void sailbook()
    {
        RealSubjectBook *rsb = new RealSubjectBook;
        dazhe();
        rsb->sailbook();
    }

    void dazhe()
    {
        cout << "双十一半价" << endl;
    }
};


int main()
{
    dangdangProxy* proxy = new dangdangProxy;
    proxy->sailbook();

    delete proxy;

    return system("pause");
}