Polymorphism in cpp
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Polymorphism is a key concept in object-oriented programming (OOP) and is supported by C++. It allows objects of different types to be treated as objects of a common base type. There are two main types of polymorphism in C++: compile-time (or static) polymorphism and runtime (or dynamic) polymorphism.
1. Compile-Time Polymorphism:
Compile-time polymorphism is achieved through function overloading and operator overloading. In function overloading, multiple functions can have the same name but different parameter lists within the same scope. The compiler determines the appropriate function to call based on the number and types of arguments during compilation.
Key Concepts:
Polymorphism Principle:
The ability to process objects of different classes through a common interface.
Function Overloading:
Multiple functions with the same name but different parameter lists.
Operator Overloading:
Redefining operators for user-defined data types.
Virtual Functions:
Functions in the base class that can be overridden by derived classes.
Abstract Classes:
Classes that have one or more pure virtual functions and cannot be instantiated.
Pure Virtual Functions:
Virtual functions with no implementation in the base class, making the class abstract.
Polymorphism enhances code flexibility, extensibility, and maintainability by allowing code to work with objects at a higher level of abstraction. It plays a crucial role in achieving the goals of OOP, such as encapsulation, inheritance, and abstraction.