{
protected $title;
protected $author;
function __construct($t, $a)
{
$this->title = $t;
$this->author = $a;
}
protected abstract function display();
}
class MyBook extends Book
{
protected $price;
function __construct($title, $author, $price)
{
parent::__construct($title, $author);
$this->price = $price;
}
function display()
{
echo "Title: {$this->title}";
echo "Author: {$this->author}";
echo "Price: {$this->price}";
}
}
$title = fgets(STDIN);
$author = fgets(STDIN);
$price = intval(fgets(STDIN));
$novel = new MyBook($title, $author, $price);
$novel->display();
