Static Class Member in OOP

 

Static  Class Member in OOP

#include<bits/stdc++.h>

#include<iostream>

using namespace std;

class counting

{

    static int counte;

public :

    void in()

    {

        counte++;

    }

 void out()

    {

        cout<<counte<<endl;

    }

};

int counting :: counte;//this is must

int main()

{

    counting a,b,c;

    a.out();

     b.out();

     c.out();

      a.in();

     b.in();

     c.in();

      a.out();

     b.out();

     c.out();

    return 0;

}