Introduction to Object-Oriented Programming (OOP) in C++    Object-Oriented Programming (OOP) is a programming paradigm that uses objects and classes to organize software design. It allows for modelling real-world entities and relationships in a program. C++ is an object-oriented programming language that provides features to implement OOP concepts effectively.   Key Concepts of OOP       Class and Object   o    Class : A blueprint for creating objects. It defines properties and behaviours of objects.         class Car {   public:       string brand;       string model;       int year;   };         o    Object : An instance of a class.         Car car1;   car1.brand = "Mahindra";   car1.model = "THAR";   car1.year = 2024;         Encapsulation   o    Encapsulation is the bundling of data and methods that operate on that data within a single unit, or class. It restricts direct acces...