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Static Function Members:
By declaring a function member as static, you make it independent of any particular object of the class. A static member function can be called even if no objects of the class exist and the static functions are accessed using only the class name and the scope resolutionoperator ::.
A static member function can only access static data member, other static member functions and any other functions from outside the class.
Static member functions have a class scope and they do not have access to the this pointer of the class. You could use a static member function to determine whether some objects of the class have been created or not.
Let us try the following example to understand the concept of static function members:
// Constructor definition
Box(double l=2.0,double b=2.0,double h=2.0)
cout<<"Constructor called."<<endl; length= l;
// Increase every time object is created
return length * breadth * height;
double length;// Length of a box
double breadth;// Breadth of a box
double height;// Height of a box };
// Initialize static member of class Box
Print total number of objects before creating object.
cout<<"Inital Stage Count: "<<Box::getCount()<<endl;
BoxBox1(3.3,1.2,1.5);// Declare box1
BoxBox2(8.5,6.0,2.0);// Declare box2
// Print total number of objects after creating object.
cout<<"Final Stage Count: "<<Box::getCount()<<endl;
When the above code is compiled and executed, it produces the following result: InitalStageCount:0
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