#include <iostream>
using namespace std;

// Abstraction

class Abstraction {
public:
 virtual void Operation() = 0;
 virtual ~Abstraction() { }
protected:
 Abstraction() { }
};

// AbstractionImp

class AbstractionImp :public Abstraction {
public:
 virtual void Operation() = 0;
 virtual ~AbstractionImp() { }
protected:
 AbstractionImp() { }
};

class ConcreteAbstractionImp :public AbstractionImp {
public:
 void Operation() {
 cout << "ConcreteAbstractionImp Operation..." << endl;
 }
};

class RefinedAbstraction :public Abstraction {
public:
 RefinedAbstraction(AbstractionImp *imp) {
 _imp = imp;
 }
 void Operation() {
 _imp->Operation();
 }
private:
 AbstractionImp *_imp;
};





int main() {

 AbstractionImp *imp = new ConcreteAbstractionImp();

 Abstraction *abs = new RefinedAbstraction(imp);

 abs->Operation();

 delete imp;
 delete abs;

 return 0;
}