二、设计模式：10、代理模式(Proxy)

class ISubject{
public:
    virtual void process();
};

 
class RealSubject : public ISubject{
public:
    virtual void process(){
        //....
    }
};

class ClientApp{

    ISubject* subject;

public:

    ClientApp(){
        subject = new RealSubject();
    }

    void DoTask(){
        //...
        subject->process();

        //....
    }
};