🚀 C++ Object-Oriented Programming (OOP)

A comprehensive collection of C++ Object-Oriented Programming (OOP) concepts, implemented with clean code, practical examples, and real-world mini projects. This repository is designed for students, beginners, and developers preparing for technical interviews and software engineering roles.

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📖 About

Object-Oriented Programming (OOP) is one of the most fundamental programming paradigms in modern software development. This repository provides a structured learning path covering beginner to advanced OOP concepts in C++, with each topic explained through simple and well-documented code examples.

Whether you're preparing for placements, interviews, or strengthening your C++ fundamentals, this repository serves as a complete learning resource.

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✨ Features

• 📚 Well-organized folder structure
• 💻 Beginner-friendly code examples
• 📝 Topic-wise explanations
• 🎯 Interview-oriented concepts
• ⚡ Modern C++ coding practices
• 🏗️ Real-world mini projects
• 🔄 Easy to navigate and extend

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📂 Repository Structure

cpp-oops-concepts/
│
├── 01_class_and_object/
├── 02_constructors/
├── 03_destructor/
├── 04_this_pointer/
├── 05_static_members/
├── 06_friend/
├── 07_inheritance/
├── 08_polymorphism/
├── 09_abstraction/
├── 10_encapsulation/
├── 11_access_specifiers/
├── 12_dynamic_memory/
├── 13_templates/
├── 14_exception_handling/
├── 15_file_handling/
├── 16_stl_with_oop/
├── 17_solid_principles/
├── 18_design_patterns/
├── 19_mini_projects/
│
├── LICENSE
└── README.md

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📚 Topics Covered

🟢 Fundamentals

• Classes and Objects
• Member Functions
• Constructors
• Destructor
• Copy Constructor
• Constructor Overloading
• this Pointer

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🟡 Class Members

• Instance Members
• Static Data Members
• Static Member Functions
• Constant Objects
• Constant Member Functions

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🔵 Access Control

• Public
• Private
• Protected

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🟣 Friend Concept

• Friend Function
• Friend Class

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🟠 Encapsulation

• Data Hiding
• Getter & Setter Methods
• Secure Class Design

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🔴 Abstraction

• Abstract Class
• Pure Virtual Function
• Interface-like Design

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🟤 Inheritance

• Single Inheritance
• Multiple Inheritance
• Multilevel Inheritance
• Hierarchical Inheritance
• Hybrid Inheritance

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🟢 Polymorphism

Compile-Time

• Function Overloading
• Operator Overloading

Run-Time

• Function Overriding
• Virtual Function
• Pure Virtual Function

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🟡 Dynamic Memory

• new Operator
• delete Operator
• Dynamic Objects

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🔵 Templates

• Function Templates
• Class Templates

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🟣 Exception Handling

• try
• catch
• throw
• Custom Exceptions

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🟠 File Handling

• Reading Files
• Writing Files
• Appending Files

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🔴 STL with OOP

• Vector of Objects
• Map of Objects
• Sorting Objects
• Custom Comparators

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🟤 SOLID Principles

• Single Responsibility Principle
• Open/Closed Principle
• Liskov Substitution Principle
• Interface Segregation Principle
• Dependency Inversion Principle

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⚙️ Design Patterns

• Singleton Pattern
• Factory Pattern

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💼 Mini Projects

• Bank Management System
• Student Management System
• Employee Management System
• Library Management System

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🛠️ Prerequisites

• C++17 or later
• GCC / G++
• Visual Studio
• Code::Blocks
• CLion
• VS Code

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▶️ Compile & Run

Linux / macOS

g++ 01_class_and_object/class_object.cpp -o app
./app

Windows

g++ 01_class_and_object/class_object.cpp -o app.exe
app.exe

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🎯 Learning Outcomes

After completing this repository, you will be able to:

• Understand Object-Oriented Programming principles
• Design reusable and maintainable C++ applications
• Implement encapsulation, inheritance, polymorphism, and abstraction
• Apply SOLID principles in software design
• Build object-oriented console applications
• Solve OOP-based interview questions confidently

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👨‍💻 Who Should Use This Repository?

• Computer Science Students
• Beginners Learning C++
• Placement Aspirants
• Software Engineering Interview Candidates
• Competitive Programmers
• Backend Developers
• Anyone interested in mastering C++ OOP

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🤝 Contributions

Contributions are welcome!

If you'd like to improve this repository:

1. Fork the repository
2. Create a new branch
3. Make your changes
4. Commit your changes
5. Open a Pull Request

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⭐ Support

If you found this repository useful:

• ⭐ Star this repository
• 🍴 Fork it
• 🛠️ Contribute improvements
• 📢 Share it with others

Your support motivates further improvements and helps others learn C++ more effectively.

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📄 License

This project is licensed under the MIT License.

Feel free to use, modify, and share it for educational and personal purposes.

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👤 Author

Raj Shekhar

B.Tech Computer Science Engineering
IIIT Bhagalpur

• 💼 Passionate about Software Development, Backend Engineering, AI, and DevOps
• 🚀 Always learning and building real-world projects

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⭐ If this repository helped you, consider giving it a Star! ⭐