HR30 Day 13: Abstract Classes 문서 원본 보기

==개요==
;<nowiki>Day 13: Abstract Classes</nowiki>
* https://www.hackerrank.com/challenges/30-abstract-classes/problem

{{HR30 헤더}}
{{HR30 10-19}}
|}

==Java==
{{참고|HR30 Day 13: Abstract Classes/Java}}
<syntaxhighlight lang='Java'>
class MyBook extends Book {
    int price;
    MyBook(String title, String author, int price) {
        super(title, author);
        this.price = price;
    }
    public void display() {
        System.out.printf("Title: %s\n", this.title);
        System.out.printf("Author: %s\n", this.author);
        System.out.printf("Price: %d\n", this.price);
    }
}
</syntaxhighlight>

==PHP==
{{참고|HR30 Day 13: Abstract Classes/PHP}}
<syntaxhighlight lang='php'>
class MyBook extends Book
{
    protected $price;
    function __construct($title, $author, $price) {
        parent::__construct(trim($title), trim($author));
        $this->price = $price;
    }
    function display() {
        echo 'Title: ' . $this->title . "\n";
        echo 'Author: ' . $this->author . "\n";
        echo 'Price: ' . $this->price . "\n";
    }
}
</syntaxhighlight>

==Python==
{{참고|HR30 Day 13: Abstract Classes/Python}}
<syntaxhighlight lang='python'>
#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:', self.price )
</syntaxhighlight>