Classes & Objects

Classes and Objects

A class is a user-defined blueprint from which objects are created. It groups data members and member functions under a single name.

Defining a Class

Use the class keyword. Members are private by default. Use access specifiers public: and private: to control visibility.

Creating Objects

Instantiate a class just like a variable. Access members with the dot operator.

#include <iostream>
using namespace std;

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

  void display() {
    cout << year << " " << brand << " " << model << "\n";
  }
};

int main() {
  Car car1;
  car1.brand = "Toyota";
  car1.model = "Corolla";
  car1.year = 2022;
  car1.display();
  return 0;
}