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//

// Created by xiemenghui on 2018/7/21.

//

#include "ObserverMain.h"

void ObserverMain()

{

// Create Subject

ConcreteSubject * pSubject = new ConcreteSubject();

// Create Observer

IObserver * pObserver1 = new ConcreteObserver("Jack Ma");

IObserver * pObserver2 = new ConcreteObserver("Pony");

// Attach Observers

pSubject->Attach(pObserver1);

pSubject->Attach(pObserver2);

// Change the price and notify the observer

pSubject->SetPrice(12.5);

pSubject->Notify();

// Detach Observers

pSubject->Detach(pObserver2);

// Change the state again and notify the observer

pSubject->SetPrice(15.0);

pSubject->Notify();

SAFE_DELETE(pObserver1);

SAFE_DELETE(pObserver2);

SAFE_DELETE(pSubject);

}