day-13-abstract-classes.js

let _input = '';
let _index = 0;
process.stdin.on('data', (data) => {
  _input = _input + data;
});
process.stdin.on('end', () => {
  _input = _input.split(new RegExp('\n'));
  main();
});
function readLine() {
  return _input[_index++];
}

/** ** Ignore above this line. ****/

class Book {
  constructor(title, author) {
    if (this.constructor === Book) {
      throw new TypeError('Do not attempt to directly instantiate an abstract class.');
    } else {
      this.title = title;
      this.author = author;
    }
  }

  display() {
    console.log('Implement the \'display\' method!');
  }
}

// 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.
   **/
  // Write your constructor here
  constructor(title, author, price) {
    super(title, author);
    this.price = price;
  }

  /**
   *   Method Name: display
   *
   *   Print the title, author, and price in the specified format.
   **/
  // Write your method here
  display() {
    console.log(`Title: ${this.title}`);
    console.log(`Author: ${this.author}`);
    console.log(`Price: ${this.price}`);
  }
  // End class
}

function main() {
  let title = readLine();
  let author = readLine();
  let price = Number(readLine());

  let book = new MyBook(title, author, price);
  book.display();
}