?? observer.cpp
字號:
//Observer.cpp
#include "Observer.h"
#include "Subject.h"
#include <iostream>
#include <string>
using namespace std;
Observer::Observer()
{
_st = '\0';
}
Observer::~Observer()
{
}
ConcreteObserverA::ConcreteObserverA(Subject* sub)
{
_sub = sub;
_sub->Attach(this);
}
ConcreteObserverA::~ConcreteObserverA()
{
_sub->Detach(this);
if (_sub != 0)
{
delete _sub;
}
}
Subject* ConcreteObserverA::GetSubject()
{
return _sub;
}
void ConcreteObserverA::PrintInfo()
{
cout<<"ConcreteObserverA observer.... "<<_sub->GetState()<<endl;
}
void ConcreteObserverA::Update(Subject* sub)
{
_st = sub->GetState();
PrintInfo();
}
ConcreteObserverB::ConcreteObserverB(Subject* sub)
{
_sub = sub;
_sub->Attach(this);
}
ConcreteObserverB::~ConcreteObserverB()
{
_sub->Detach(this);
if (_sub != 0)
{
delete _sub;
}
}
Subject* ConcreteObserverB::GetSubject()
{
return _sub;
}
void ConcreteObserverB::PrintInfo()
{
cout<<"ConcreteObserverB observer.... "<<_sub->GetState()<<endl;
}
void ConcreteObserverB::Update(Subject* sub)
{
_st = sub->GetState();
PrintInfo();
}
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