In C++, a class is a user-defined data type that serves as a blueprint for creating objects. An object is an instance of a class, containing data and methods that operate on that data.

Key Topics

• Defining Classes
• Creating Objects
• Class Members

1. Defining Classes

A class is defined using the class keyword followed by the class name and a set of curly braces containing its members.

Example: Class Definition

class Car {
public:
    std::string brand;
    std::string model;
    int year;
};

2. Creating Objects

Objects can be created using the class definition. An object is instantiated by declaring a variable of the class type.

Example: Creating an Object

Car myCar;
myCar.brand = "Toyota";
myCar.model = "Corolla";
myCar.year = 2020;

3. Class Members

Class members can be variables (attributes) or functions (methods). Members can have different access specifiers: public, private, or protected.

Example: Class with Methods

class Car {
public:
    std::string brand;
    std::string model;
    int year;
    void displayInfo() {
        std::cout << brand << " " << model << " " << year << std::endl;
    }
};