20. Quiz: Building Classes and Subclasses (2-3)

Directions:

Create a Bicycle subclass that extends the Vehicle class. The Bicycle subclass should override Vehicle's constructor function by changing the default values for wheels from 4 to 2 and horn from 'beep beep' to 'honk honk'.

Your Code:

Start Quiz:

/*
 * Programming Quiz: Building Classes and Subclasses (2-3)
 */

class Vehicle {
	constructor(color = 'blue', wheels = 4, horn = 'beep beep') {
		this.color = color;
		this.wheels = wheels;
		this.horn = horn;
	}

	honkHorn() {
		console.log(this.horn);
	}
}

// your code goes here

/* tests
const myVehicle = new Vehicle();
myVehicle.honkHorn(); // beep beep
const myBike = new Bicycle();
myBike.honkHorn(); // honk honk
*/

User's Answer:

(Note: The answer done by the user is not guaranteed to be correct)

/*
 * Programming Quiz: Building Classes and Subclasses (2-3)
 */

class Vehicle {
	constructor(color = 'blue', wheels = 4, horn = 'beep beep') {
		this.color = color;
		this.wheels = wheels;
		this.horn = horn;
	}

	honkHorn() {
		console.log(this.horn);
	}
}

// your code goes here
class Bicycle extends Vehicle {
  constructor(color, wheels = 2, horn = 'honk honk') {
    super(color, wheels, horn);
    this.horn = horn;
  }
  honkHorn() {
    super.honkHorn();
  }
}

const myVehicle = new Vehicle();
myVehicle.honkHorn(); // beep beep
const myBike = new Bicycle();
myBike.honkHorn(); // honk honk

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