Difference Between Class and Object in C++ expalin in detail

Difference Between Class and Object in C++

Aspect	Class	Object
Definition	A blueprint or template that defines data members and functions but doesn’t occupy memory itself.	A real instance of a class that occupies memory and holds actual data.
Nature	Abstract concept	Concrete entity
Memory	No memory allocation until object is created	Memory is allocated when an object is created
Usage	Defines properties and behaviors	Used to access the properties and behaviors defined by the class
Example	class Car { /* members */ };	Car car1; creates an object car1 of class Car
Purpose	Acts as a template to create objects	Represents an actual entity with state and behavior

Explanation:

A Class is like a blueprint or plan for creating objects. It describes what data and methods the objects will have. It’s a user-defined data type.

An Object is a specific instance of the class. When you create an object, memory is allocated and you can use it to access the class’s variables and functions.

#include <iostream>
using namespace std;

// Define a class named Car
class Car {
public:
    string brand;
    int year;

    void displayInfo() {
        cout << "Brand: " << brand << ", Year: " << year << endl;
    }
};

int main() {
    // Create an object car1 of class Car
    Car car1;

    // Access and set data members
    car1.brand = "Honda";
    car1.year = 2020;

    // Call member function
    car1.displayInfo();  // Output: Brand: Honda, Year: 2020

    return 0;
}

Here, Car is the class — it describes what a car is.
car1 is an object — a real car with brand "Honda" and year 2020.