Suppose the base class and the derived class each have a...

Name: Problem 14, Chapter 15: Problem Solving with C++
Uploaded: 2020-06-25T21:31:59-08:00
Duration: 57 s
Channel: Aditya Sood
Description: Suppose the base class and the derived class each have a member function with the same signature. When you have a pointer to a base class object and call a function member through the pointer, discuss what determines which function is actually called-the base class member function or the derived-class function.

Suppose the base class and the derived class each have a member function with the same signature. When you have a pointer to a base class object and call a function member through the pointer, discuss what determines which function is actually called-the base class member function or the derived-class function.

Key Concepts

Polymorphism

Polymorphism is the ability of different classes to be treated as instances of a common base class, particularly when they override methods of the base class. Through polymorphism, using virtual functions and dynamic binding, a program can call methods on base class pointers or references and have the correct derived class version of the method executed at runtime.

Inheritance

Inheritance is a core concept in object-oriented programming that allows a class (derived) to inherit attributes and methods from another class (base). This relationship enables code reuse and the creation of natural hierarchies, where the derived class can extend or modify behaviors of the base class.

Function Overriding

Function overriding occurs when a derived class provides its own implementation of a member function that is already defined in its base class. This allows the derived class to customize or completely change the behavior of the function to suit its own needs, while still maintaining the same function signature.

Virtual Functions

Virtual functions are member functions declared with the 'virtual' keyword in a base class, which means they can be overridden in any derived class. The use of virtual functions enables dynamic (run-time) binding, so that the correct function implementation is called based on the actual object type that the pointer or reference points to.

Dynamic Binding

Dynamic binding (also known as late binding) is the process by which a call to an overridden function is resolved at runtime, rather than at compile time. This mechanism is essential for achieving polymorphism, ensuring that the appropriate function version is executed depending on the object's actual class instance.

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