Introduction to design patterns, observer patterns, C + + code implementation

Test02.cpp:Defines the entry point for the console application.
//
Design Pattern 2nd Observer pattern
#include "stdafx.h"
#include <vector>
using namespace Std;

Class Observer;

Class subject{
Public
virtual void Registerobjecet (observer* o) {};
void Removeobserver (Observer o);
void Notifyobservers ();
};

Class Observer
{
Public
virtual void update (float temp,float humidity,float pressure) {};

BOOL operator = = (Const Observer * d)//heavy Load = =
{
return this = = D;
}
};

Class displayelement{
Public
void display ();
};

Class Weatherdata:public Subject
{
Private
Vector<observer*> observers;
Vector<observer*>::iterator ITER;
float temperature;
float humidity;
float pressure;
Public
Weatherdata () {
}

Public
void Registerobjecet (observer* o)
{
Observers.push_back (o);
}

void Removeobserver (Observer o)
{
for (iter = Observers.begin (); ITER! = Observers.end (); ++iter)
{
if (*iter = = &o)
{
Observers.erase (ITER);
Break
}
}
}

void Notifyobservers ()
{
for (int i = 0; i < observers.size (); i++)
{
observer* Observer = observers[i];
Observer->update (temperature,humidity,pressure);
}
}

void Measurementschanged ()
{
Notifyobservers ();
}

void Setmeasurements (float temperature,float humidity,float pressure)
{
This->temperature = temperature;
this->humidity = humidity;
This->pressure = pressure;
Measurementschanged ();
}
};

Class Currentconditionsdisplay:public Observer,public Displayelement
{
Public
float temperature;
float humidity;
subject* Weatherdata;

Public
Currentconditionsdisplay (subject* in_weatherdata)
{
This->weatherdata = In_weatherdata;
In_weatherdata->registerobjecet (/* (observer*) */this);
}

void update (float temperature,float humidity,float pressure)
{
This->temperature = temperature;
this->humidity = humidity;
Display ();
}

void display ()
{
printf ("Current conditions:%f f degrees and%f percent humidity\n", temperature,humidity);
}
};

Weatherstation
int _tmain (int argc, _tchar* argv[])
{
weatherdata* weatherdata = new Weatherdata;

Currentconditionsdisplay Currentdisplay (Weatherdata);
Weatherdata->setmeasurements (80,65,30.4f);
Weatherdata->setmeasurements (82,70,29.2f);
Weatherdata->setmeasurements (78,90,29.2f);
return 0;
}

Introduction to design patterns, observer patterns, C + + code implementation