C++ program to illustrate Static Class data and static Function

Program: 

// To illustrate Static Class data and static Function

// Program coutns the number of instances or objects created

#include <iostream>

using namespace std;

class statgeek

{

    int id;

    static int count; // declaring a static variable

    public:

           statgeek()

           {

               count++; // incremented each time a objet is created

               id=count;

           }

    void print()

    { cout<<"ID is :" <<id<<endl; } //to print the id of the object

    static void printcount()

    { cout<<endl<<"The number of objects created are:"<< count<<endl;} // a static function

};

   int statgeek::count=0;

   int main()

   {

       statgeek obj1; //count will be incremented

       cout<<"Object1 :"; obj1.print();

       statgeek obj2; //count will be incremented

       cout<<"Object2 :"; obj2.print();

       statgeek obj3; //count will be incremented

       cout<<"Object3 :"; obj3.print();

       statgeek::printcount(); // static function can be called without associating with the object

    }

    }

Output: