Simple Class with Constructor

Snippet

Simple Class with Constructor

Classes bundle data (attributes) and functions (methods) into a single unit. This Dog class has a constructor that initializes name and age when creating a Dog object. The bark() method demonstrates how objects encapsulate behavior. You create instances with the constructor, then call their methods using dot notation. Classes are the foundation of object-oriented programming in C++.

snippet.cpp
cpp
#include <iostream>
#include <string>
class Dog {
public:
    std::string name;
    int age;
    
    Dog(std::string n, int a) {
        name = n;
        age = a;
    }
    
    void bark() {
        std::cout << name << " says: Woof!" << std::endl;
    }
};
 
int main() {
    Dog myDog("Buddy", 3);
    myDog.bark();
    return 0;
}

Breakdown

class Dog {

Class definition starting with keyword and class name

public:

Access specifier making members accessible from outside the class

Dog(std::string n, int a)

Constructor - same name as class, initializes new objects

name = n; age = a;

Assignment statements inside constructor body

void bark()

Member function declaration returning nothing

Dog myDog("Buddy", 3);

Object creation calling the constructor with arguments

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Simple Class with Constructor

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