#include <iostream>
using namespace std;

class Subject {
public:
 virtual void Request() = 0;
 virtual ~Subject() { }
};

class ConcreteSubject :public Subject {
public:
 void Request() {
 cout << "ConcreteSubject::Request..." << endl;
 }
};

class Proxy {
public:
 Proxy(Subject* subject) {
 _sub = subject;
 }

 void Reuqest() {
 cout << "Proxy::Request..." << endl;
 _sub->Request();
 }

private:
 Subject *_sub;
};

int main() {
 Subject *sub = new ConcreteSubject();
 Proxy *p = new Proxy(sub);
 p->Reuqest();

 delete sub;
 delete p;

 return 0;
}