whatVFbased

WhatVFbased is a term used to describe a type of virtual function in object-oriented programming, particularly in languages like C++ and Java. It refers to a virtual function that is declared in a base class and is intended to be overridden in derived classes. The term "what" is used to inquire about the purpose or functionality of a virtual function, while "VFbased" specifies that the virtual function is located in a base class.

Virtual functions are a key feature of polymorphism, allowing a program to call a derived class function through a base class pointer or reference. This enables dynamic method dispatch, where the actual function to be called is determined at runtime based on the object's actual type.

In C++, a virtual function is declared using the "virtual" keyword in the base class. For example:

class Base {

public:

virtual void display() {

cout << "Display Base version";

}

};

In Java, all non-static and non-private methods are virtual by default, but the "virtual" keyword is not used.

When a derived class overrides a virtual function, it provides a specific implementation for that function. The overridden function in the derived class can then be called through a base class pointer or reference, demonstrating polymorphism.

WhatVFbased is a useful concept for understanding and implementing polymorphism in object-oriented programming. It allows for greater flexibility and extensibility in code design, enabling the creation of more modular and reusable software components.