Static Integers Tutorial in C++

#include <iostream.h>

#include <conio.h>

class Counter

{

      private:

      static int count;

      public:

      Counter()

      {

            count++;

      }

      void display();

};

int Counter::count;

void Counter::display()

{

      cout<<count;

}

//int Counter::count;

void main(void)

{

      clrscr();

      Counter o1,o2,o3,o4;

      cout << "Objects in existence: ";

      o4.display();

      getch();

}