Method overriding in C++ - Mini Project: Build & Apply

Method overriding

📖 Scenario: Imagine you have a basic Animal class that can make a sound. Different animals make different sounds. We want to show how to change the sound for specific animals by overriding the method.

🎯 Goal: You will create a base class Animal with a method makeSound(). Then, you will create a derived class Dog that overrides makeSound() to show a different sound. Finally, you will print the sounds from both classes.

📋 What You'll Learn

Create a base class called Animal with a public method makeSound() that prints "Some generic animal sound"

Create a derived class called Dog that inherits from Animal

Override the makeSound() method in Dog to print "Bark"

Create objects of both Animal and Dog and call their makeSound() methods

Print the output exactly as specified

💡 Why This Matters

🌍 Real World

Method overriding lets programmers change how inherited methods work for specific types, like different animals making different sounds.

💼 Career

Understanding method overriding is key for working with object-oriented languages and designing flexible, reusable code in software development.

1

Create the base class Animal

Write a class called Animal with a public method makeSound() that prints exactly "Some generic animal sound".

C++

// Define class Animal with makeSound() method
// Your code here

Need a hint?

Use class Animal and define makeSound() inside it. Use cout to print the sound.

2

Create the derived class Dog

Create a class called Dog that inherits from Animal. Override the makeSound() method to print exactly "Bark".

C++

#include 
using namespace std;

class Animal {
public:
    void makeSound() {
        cout << "Some generic animal sound" << endl;
    }
};

// Define class Dog that inherits Animal and overrides makeSound()
// Your code here

Need a hint?

Use class Dog : public Animal and define makeSound() inside it. Use cout to print "Bark".

3

Create objects and call makeSound()

Create an object called animal of type Animal and an object called dog of type Dog. Call makeSound() on both objects.

C++

#include 
using namespace std;

class Animal {
public:
    void makeSound() {
        cout << "Some generic animal sound" << endl;
    }
};

class Dog : public Animal {
public:
    void makeSound() {
        cout << "Bark" << endl;
    }
};

int main() {
    // Create animal and dog objects
    // Call makeSound() on both
    // Your code here
    return 0;
}

Need a hint?

Inside main(), create Animal animal; and Dog dog;. Then call animal.makeSound(); and dog.makeSound();.

4

Print the output

Run the program and print the output of calling makeSound() on both animal and dog objects. The output should be exactly two lines: Some generic animal sound and Bark.

C++

#include 
using namespace std;

class Animal {
public:
    void makeSound() {
        cout << "Some generic animal sound" << endl;
    }
};

class Dog : public Animal {
public:
    void makeSound() {
        cout << "Bark" << endl;
    }
};

int main() {
    Animal animal;
    Dog dog;
    animal.makeSound();
    dog.makeSound();
    // Output printed above
    return 0;
}

Need a hint?

Run the program. The output should show the two sounds on separate lines.