Pointer to static data member of Class

1. Code

1#include <iostream>2#include <stdio.h>3 using namespacestd;4 class Point5 {6      Public:7Point (intx=0,inty=0): X (x), Y (y)8     { 9count++;Ten     } OnePoint (ConstPoint &p): X (p.x), Y (p.y) A     {  -count++; -     } the~point () {count--;} -     intGetx ()Const{returnx;} -     intGety ()Const{returny;} -     Static intCount//Note to define the following to public, you have access rights +     Private: -     intx, y;  + }; A intPoint::count=0;//static data member definition and initialization, using Class name qualification at intMain () - {  -     int*ptr=&point::count;//defines an int pointer that points to a static member of a class -Point A (4,5); -cout<<"Point A:"<<a.getx () <<","<<a.gety () <<Endl; -cout<<"Object count="<<*ptr<<Endl; inPoint B (a);//use one of the objects of the class to do another argument to the object, call the copy constructor -cout<<"Point B:"<<b.getx () <<","<<b.gety () <<Endl; tocout<<"Object count="<<*ptr<<Endl; +System"Pause"); -     return 0; the}

2. Running Results
Same as the last one.

The Note:count type is static and access rights are public.

Pointer to static data member of Class