In this HackerRank Day 13: Abstract Classes problem solution You are Given a Book class and a Solution class, write a MyBook class that does the following:

1. Inherits from Book
2. Has a parameterized constructor taking these 3 parameters:
3. string title
4. string author
5. int price
6. Implements the Book class' abstract display() method so it prints these 3 lines:
7. Title:, a space, and then the current instance's title.
8. Author:, a space, and then the current instance's author.
9. Price:, a space, and then the current instance's price.

## Problem solution in Python programming.

```#Write MyBook class
class MyBook(Book):
def __init__(self, title, author, price):
super().__init__(title, author)
self.price = price
def display(self):
print("Title: " + self.title)
print("Author: " + self.author)
print("Price: " + str(self.price))```

### Problem solution in Java programming.

```//Write MyBook Class

class MyBook extends Book{
private int price;
public MyBook(String title, String author, int price){
super(title, author);
this.price = price;
}

void display(){
System.out.println("Title: "+title);
System.out.println("Author: "+author);
System.out.println("Price: "+price);
}
}```

### Problem solution in C++ programming.

```//Write MyBook class
class MyBook : public Book {
private:
int price;
public:
MyBook(string title, string author, int price) : Book(title, author) {
this->price = price;
}

void display() {
cout << "Title: " << title << "\n";
cout << "Author: " << author << "\n";
cout << "Price: " << price << "\n";
}
};```

### Problem solution in Javascript programming.

```class MyBook extends Book {
constructor(t, a, p) {
super(t, a);
this.t = t;
this.a = a;
this.p = p;
}

display() {
console.log(`Title: \${this.t}`);
console.log(`Author: \${this.a}`);
console.log(`Price: \${this.p}`);
}
}```