#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;

}