Static member function

What is static member function? 

A member function that is declared as static in a program is known as static functions.

The static function has the following properties:

• A static function in a program can access to only other static member declared in the same program or in the same class. 

• A static member function of a class can be called using the class_name as follows: 

class_name :: function_name;

C++ program which explains the working of static member function in a class

Program Code:

#include <iostream>

using namespace std;

class First

{

static int a;

static int b;

public:

static void display()

{

cout <<"Addition of a and b is : " << a+b << endl;

}

};

//static data members initializations

int First :: a =10;

int First :: b =20;

int main()

{

First c;

//accessing class name with object name

cout<<"Printing through object name:"<<endl;

c.display();

//accessing class name with class name

cout<<"Printing through class name:"<<endl;

First::display();

return 0;

}

The program output is tested on www.jdoodle.com

Output:

Printing through object name:

Value of a : 10

Value of b : 20

Printing through class name:

Value of a : 10

Value of b : 20

Thanks

Mukesh Rajput