🔹 OOPs (Object-Oriented Programming System) in C++

👉 Definition:

OOPs ek programming paradigm hai jisme hum apne code ko "objects" aur "classes" ke form me organize karte hain.

• Class = Blueprint/template (design)
• Object = Class ka real-world instance (use kiya gaya cheez)

Example:

• Car ek class hai (blueprint – car ka design).
• MyCar ek object hai (aapki khud ki car jo aap use kar rahe ho).

🔹 OOPs Concepts in C++

1. Class & Object
   • Class = template (variables + functions)
   • Object = class ka real entity
2. Encapsulation
   • Data (variables) + Functions (methods) ko ek single unit me band karna.
   • Example: private, public, protected keywords.
3. Abstraction
   • Sirf zaroori details dikhana aur implementation hide karna.
   • Example: cin & cout internally complex hote hain, lekin hum simple use karte hain.
4. Inheritance
   • Ek class dusri class ke features ko inherit karti hai.
   • Example: Car class se SportsCar class bana sakte ho.
5. Polymorphism
   • "Many forms" – ek function alag-alag tarike se kaam karega.
   • Types: Compile-time (function overloading, operator overloading), Run-time (virtual functions).

🔹 Kyu OOPs padhna zaroori hai?

1. Real-world problems solve karne ke liye best approach
   • Code real-world entities jaisa lagta hai (BankAccount, Student, Car).
2. Code Reusability
   • Inheritance aur modular design se same code bar-bar likhne ki zaroorat nahi.
3. Scalability aur Maintainability
   • Large projects easily manage hote hain.