Static Member Function and its characteristics

We can define the class member function as static with the help of a static keyword which makes the class member function independent of any particular object. 

A static member function may be called even though no object in the class exists and the static functions are accessible using only the class name and the scope resolution operator (::).

A static member function may only access static data member, other static member functions and any other functions outside the class.

The static member features have a class scope and they do not have access to that class pointer.

Example Program:

#include <iostream>
using namespace std;
class Item
{
static int count;
public:
static void display() { 
cout<<"Count = "<< ++count<<endl;
}
};
int Item::count;
int main()
{
Item::display();
Item::display();
return 0;
}

Output: