programming-inheritance

Programming Inheritance

• To program inheritance, you should already have a solid understanding of what inheritance in Object Oriented Programming (OOP) is.

How do you Define Inheritance?

Pseudocode

Pseudocode for a class created using inheritance

Java

//vehicle class created

public class Vehicle {

//attributes created for the vehicle class

private String manufacturer;

private String make;

private double cost;

 

//constructor to create objects of type vehicle

public Vehicle(String manufacturer, String make, double cost) {

this.manufacturer = manufacturer;

this.make = make;

this.cost = cost;

}

 

//method to start the engine of the car

public void turnEngineOn() {

//code to turn the engine on

}

//method to stop the engine of the car

public void turnEngineOff() {

//code to turn the engine off

}

//method to steer the car to the left

public void steerLeft() {

// code to steer the vehicle left

}

//method to steer the car to the right

public void steerRight() {

// code to steer the vehicle right

}

}

 

//Derived Class (Car)

//the Car class uses the keyword 'extends' to inherit from the Vehicle class

public class Car extends Vehicle {

private boolean isInsured;

private double engineCapacity;

 

// Constructor to create objects of type Car

public Car(String manufacturer, String make, double cost, boolean isInsured, double engineCapacity) {

//the super keyword is used to inherit the attributes from the base class

super(manufacturer, make, cost);

this.isInsured = isInsured;

this.engineCapacity = engineCapacity;

}

//method to change gear 

public void gearChange() {

//code to change the gear of the car

}

//method to unlock the vehicle doors

public void unlockDoors() {

//code to unlock the doors of the car

}

}

Python

#Base class (Vehicle)

#Vehicle class created

class Vehicle:

#attributes created for the Vehicle class 

def __init__(self, manufacturer, make, cost):

self.manufacturer = manufacturer

self.make = make

self.cost = cost

 

#method to start the engine of the car

def turn_engine_on(self):

# Code to turn the engine on

#method to stop the engine of the car

def turn_engine_off(self):

# Code to turn the engine off

#method to steer the car to the left

def steer_left(self):

# Code to steer the vehicle left

#method to steer the car to the right

def steer_right(self):

# Code to steer the vehicle right

 

#Derived Class (Car)

#the Car class uses the keyword parent class name in parenthesis to inherit from the Vehicle class

class Car(Vehicle):

def __init__(self, manufacturer, make, cost, is_insured, engine_capacity):

#the super keyword is used to inherit the attributes from the base class

super().__init__(manufacturer, make, cost)

self.is_insured = is_insured

self.engine_capacity = engine_capacity

#method to change gear

def gear_change(self):

# Code to change the gear of the car

 

#method to steer the car to the right

def unlock_doors(self):

# Code to unlock the doors of the car