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#ifndef OBSERVER_H

#define OBSERVER_H

#include <iostream>

#include <string>

#include "Subject.h"

using namespace std;

class Observer {

public:

virtual void Update(Subject* sub) = 0;

virtual void PrintInfo() = 0;

virtual ~Observer();

protected:

Observer();

string _st;

};

class ConcreteObserver :public Observer {

public:

virtual Subject* GetSubject();

ConcreteObserver(Subject* sub);

~ConcreteObserver();

void Update(Subject* sub);

void PrintInfo();

private:

Subject *_sub;

};

#endif //OBSERVER_H