OBJECT ORIENTED PROGRAMMING
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PRESENTED BY,
S.JAILANI BEEVI

[attachment=7706]

VIRTUAL FUNCTIONS

A virtual function is a member function that is declared within a base class and redefined by a derived class.


To create a virtual function, precede the function’s declaration in the base class with the keyword virtual.


When a class containing a virtual function is inherited, the derived class redefines the virtual function to fit its own needs.

Calling a Virtual Function Through a Base Class Reference

When a virtual function is called through a base-class
reference , the version of the function executed is
determined by the object being referred to at the time
of the call.

The Virtual Attribute Is Inherited

When a derived class that has inherited a virtual function is itself used as a base class for another derived class, the virtual function can still be overridden.



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