package com.study.demo3;

public class Main {
  public static void main(String[] args) {

    System.out.println("--- 测试 EBook ---");

    EBook ebook = new EBook("123-456", "Java Programming", 2.5);
    System.out.println("EBook Status (Initial): " + ebook.toString());

    ebook.setAvailable(false);
    System.out.println("EBook Status (Borrowed): " + ebook.toString());

    ebook.returnBook();
    System.out.println("EBook Status (After Return): " + ebook.toString());

    System.out.println("\n--- 测试 PrintedBook ---");
    PrintedBook pbook = new PrintedBook();
    pbook.setIsbn("789-012");
    pbook.setTitle("Python Guide");
    pbook.setStock(10);
    System.out.println("PBook Status (Initial): " + pbook.toString());

    pbook.setAvailable(false);
    System.out.println("PBook Status (Borrowed): " + pbook.toString());

    pbook.returnBook();
    System.out.println("PBook Status (After Return): " + pbook.toString());
  }
}