C++ Hierarchical Inheritance 🎯

Welcome back to CodeYourCraft! Today, we're diving into an exciting topic - Hierarchical Inheritance in C++. This concept is a powerful tool that helps organize code and reuse functionality. Let's get started!

Understanding Hierarchical Inheritance 📝

Hierarchical Inheritance is a type of inheritance where a class derives from multiple parent classes. It helps create a class hierarchy, where each class represents a category in a hierarchy.

Imagine a university, where every student belongs to a department. Each department may have different requirements, but a student shares common characteristics regardless of the department. Here, the student class can inherit from the department classes, thus creating a hierarchical relationship.

Creating Hierarchical Inheritance ✅

Let's create a simple example of a Vehicle class with two derived classes Car and Bicycle. Both Car and Bicycle will inherit from the Vehicle class.

cpp

// Base class - Vehicle
class Vehicle {
public:
    std::string name;
    int wheels;

    Vehicle(std::string n, int w) : name(n), wheels(w) {}
};

// Derived class - Car
class Car : public Vehicle {
public:
    int doors;

    Car(std::string n, int w, int d) : Vehicle(n, w) {
        doors = d;
    }
};

// Derived class - Bicycle
class Bicycle : public Vehicle {
public:
    int gears;

    Bicycle(std::string n, int w, int g) : Vehicle(n, w) {
        gears = g;
    }
};

In this example, we have a Vehicle class with two properties - name and wheels. The Car and Bicycle classes inherit from the Vehicle class and add their own properties - doors for Car and gears for Bicycle.

Using Hierarchical Inheritance 💡

Now, let's see how to create and use instances of these classes.

cpp

int main() {
    Car myCar( "Tesla Model 3", 4, 4 );
    Bicycle myBicycle( "Trek", 2, 21 );

    std::cout << "My Car: " << myCar.name << " has " << myCar.wheels << " wheels and " << myCar.doors << " doors." << std::endl;
    std::cout << "My Bicycle: " << myBicycle.name << " has " << myBicycle.wheels << " wheels and " << myBicycle.gears << " gears." << std::endl;

    return 0;
}

In the main function, we create instances of Car and Bicycle classes, and print their properties.

Quiz 🎓

That's it for today! We hope you found this lesson on C++ Hierarchical Inheritance helpful. In the next lesson, we'll dive deeper into inheritance and explore more advanced concepts. Stay tuned! 🎯