# HackerRank Day 13 Abstract Classes 30 days of code solution

In this HackerRank Day 13 Abstract Classes 30 days of code problem set, we have two classes Book and Solution. we need to make a new class MyBook that inherited from Book and can print the details.

## Problem solution in Python 2 programming.

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

## Problem solution in Python 3 programming.

```#Write MyBook class

class MyBook(Book):

def __init__(self,title,author,price):
self.title = title
self.author = author
self.price = price

def display(self):
print("Title:", title)
print("Author:", author)
print("Price:",price)```

### Problem solution in java programming.

```class MyBook extends Book{
int price;

MyBook(String title, String author, int price){
super(title, author);
this.price = price;
}

public void display(){
System.out.println(
"Title: " + this.title + "\n"
+   "Author: " + this.author + "\n"
+   "Price: " + this.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), price(price) {

}

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

### Problem solution in Javascript programming.

```// Declare your class here.
class MyBook extends Book{

/**
*   Class Constructor
*
*   @param title The book's title.
*   @param author The book's author.
*   @param price The book's price.
**/
constructor(title, author, price) {
super(title, author);
this.price = price;
}
/**
*   Method Name: display
*
*   Print the title, author, and price in the specified format.
**/