import java.util.Scanner;

public class SimpleLibrary { public static void main(String[] args) { Scanner sc = new Scanner(System.in);

String[] books = {"Java Programming", "Data Structures", "Database Systems"}; boolean[] isAvailable = {true, true, true}; int choice;

do { System.out.println("\n===== LIBRARY MANAGEMENT SYSTEM ====="); System.out.println("1. Display Books"); System.out.println("2. Borrow Book"); System.out.println("3. Return Book"); System.out.println("4. Exit"); System.out.print("Enter your choice: "); choice = sc.nextInt();

switch (choice) { case 1: System.out.println("\nAvailable Books:"); for (int i = 0; i < books.length; i++) { System.out.println((i + 1) + ". " + books[i] + " - " + (isAvailable[i] ? "Available" : "Borrowed")); } break;

case 2: System.out.print("Enter book number to borrow: "); int borrow = sc.nextInt(); if (borrow >= 1 && borrow <= books.length) { if (isAvailable[borrow - 1]) { isAvailable[borrow - 1] = false; System.out.println("You borrowed " + books[borrow - 1]); } else { System.out.println("Sorry, that book is already borrowed!"); } } else { System.out.println("Invalid book number!"); } break;

case 3: System.out.print("Enter book number to return: "); int ret = sc.nextInt(); if (ret >= 1 && ret <= books.length) { if (!isAvailable[ret - 1]) { isAvailable[ret - 1] = true; System.out.println("You returned " + books[ret - 1]); } else { System.out.println("That book was not borrowed!"); } } else { System.out.println("Invalid book number!"); } break;

case 4: System.out.println("Thank you for using the Library System!"); break;

default: System.out.println("Invalid choice, please try again!"); } } while (choice != 4);

sc.close(); } }