Key Concepts

Review core concepts you need to learn to master this subject

Classes and Objects

Access Specifiers

Constructors

Inheritance

Polymorphism

Class Members

Constructor

Objects

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Classes and Objects

#include <iostream>

class Dog {
public:
  int age;
  
  void sound() {
    std::cout << "woof\n";
  }
};

int main() {
  Dog buddy;
  
  buddy.age = 5;
  
  buddy.sound();	// Outputs: woof
}

A C++ class is a user-defined data type that encapsulates information and behavior about an object.

A class can have two types of class members:

  • Attributes, also known as member data, consist of information about an instance of the class.
  • Methods, also known as member functions, are functions that can be used with an instance of the class.

An object is an instance of a class and can be created by specifying the class name.

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