Home > DeveloperSection > Interviews > What is pure virtual function?

Posted on    October-16-2010 12:00 AM

 Visual C++ Visual C++ 
Ratings:
 2 Answer(s)
  1507  View(s)
Rate this:

Uttam Misra

Total Post:54

Points:270
Posted on    October-18-2010 12:00 AM

Pure Virtual Function is a Virtual function with no body. Since pure virtual function has no body, the programmer must add the notation =0 for declaration of the pure virtual function in the base class.

Chris S
Chris S

Total Post:23

Points:115
Posted on    November-10-2010 1:00 AM

In inheritance if the base class contains a virtual function equating to zero, it is known also as do-nothing function & that base class is called as abstract base class as there are no instances or objects can be created by this base class. And this pure virtual can be filled with the codes in successiv derived classes accordin to the user requirements.

The Syntax of the pure virtual function is

class class_name

{ visibility mode:\\should be protected:

 virtual return_type function_name()=0; }

 new class_name : inheritance_type old class_name

 {

...............

 }


Modified On Mar-21-2016 06:52:21 AM

Don't want to miss updates? Please click the below button!

Follow MindStick