What Is Object Oriented Programming Using C++?


Heather Bennett

In this tutorial, we will discuss the concept of Object Oriented Programming (OOP) using C++. OOP is a programming paradigm that organizes data and behavior into reusable structures called objects. It provides a way to model real-world entities and their interactions.

What is Object Oriented Programming?

Object Oriented Programming is a programming paradigm that focuses on creating objects that contain both data and functions. Objects are instances of classes, which serve as blueprints for creating objects. OOP promotes code reusability, modularity, and easier maintenance.

Key Concepts of OOP:

  • Encapsulation: Encapsulation refers to the bundling of data and methods within a single unit called an object. It hides the internal details of an object from outside access, allowing only specific methods to interact with the object’s data.
  • Inheritance: Inheritance allows classes to inherit properties and behaviors from other classes. It establishes a hierarchical relationship between classes, where derived classes inherit characteristics from their base class or parent class.
  • Polymorphism: Polymorphism means having multiple forms.

    In OOP, polymorphism allows objects of different classes to be treated as objects of a common base class. It enables the use of a single interface for multiple types of objects.

  • Abstraction: Abstraction focuses on hiding unnecessary details and presenting only essential information to users. It simplifies complex systems by providing well-defined interfaces for interacting with objects without revealing their internal complexities.

C++ and OOP:

C++ is an object-oriented programming language that supports all the key concepts of OOP. It provides powerful features like classes, objects, inheritance, polymorphism, and data hiding through access specifiers (public, private, protected).

Classes in C++ define the structure and behavior of objects. They encapsulate data members (variables) and member functions (methods) that operate on the data. Objects are instances of classes that can be created and manipulated within a program.

C++ also supports inheritance, allowing derived classes to inherit properties and behaviors from base classes. This promotes code reuse and allows for the creation of specialized classes based on existing ones.

Polymorphism in C++ is achieved through function overloading and virtual functions. Function overloading enables multiple functions with the same name but different parameters to coexist in a class. Virtual functions allow dynamic binding of functions at runtime based on the object’s type.

Abstraction in C++ involves creating abstract classes that provide an interface for derived classes to implement. Abstract classes cannot be instantiated but can be used as base classes for derived classes.

Benefits of OOP:

  • Modularity: OOP allows breaking down complex problems into manageable modules (classes), making code more organized and maintainable.
  • Code Reusability: With inheritance and polymorphism, existing code can be reused to create new derived classes, reducing development time.
  • Data Security: Encapsulation hides sensitive data from outside access, providing better security for the data.
  • Easier Debugging: OOP’s modular structure makes it easier to isolate and fix issues without affecting other parts of the program.


In conclusion, Object Oriented Programming is a powerful programming paradigm that brings real-life modeling to software development. C++ is one of the popular languages that fully supports OOP concepts and provides various features to implement them. Understanding OOP principles and utilizing them can greatly improve code organization, reusability, and maintainability.

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