LibrarySystem.java

import java.util.Scanner;

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

        String[] books = {"Java", "Python", "C++", "HTML", "CSS", "JS"};
        double[] prices = {300.0, 250.0, 200.0, 150.0, 100.0, 50.0};
        int[] stocks = {5, 0, 3, 2, 1, 0};

        System.out.println("Welcome to Elramly Library");
        System.out.print("Please enter the book name: ");
        String bookName = input.nextLine();

        for (int i = 0; i < books.length; i++) {
            if (books[i].equalsIgnoreCase(bookName)) {
                System.out.println("The book exists. Original price: " + prices[i]);

                if (stocks[i] == 0) {
                    System.out.println("Sorry, the book is currently not available.");
                    input.close();
                    return;
                }

                double finalPrice = prices[i] * 0.9;
                System.out.println("Price after 10% discount: " + finalPrice);

                System.out.print("Do you want delivery? Yes -> 1, No -> 0: ");
                int delivery = input.nextInt();

                if (delivery == 1) {
                    finalPrice += 50;
                    System.out.println("Delivery fees have been added.");
                }

                System.out.println("Final price: " + finalPrice + "$");

                System.out.print("Do you want to buy a song? Yes -> 1, No -> 0: ");
                int accept = input.nextInt();

                if (accept == 1) {
                    System.out.println("Which song do you want?");
                    System.out.println("1. Amr Diab - 20$");
                    System.out.println("2. Tamer Hosny - 30$");
                    System.out.println("3. George Wassouf - 50$");

                    int choice = input.nextInt();

                    if (choice == 1) {
                        System.out.println("Your choice is Amr Diab.");
                        finalPrice += 20;
                    } else if (choice == 2) {
                        System.out.println("Your choice is Tamer Hosny.");
                        finalPrice += 30;
                    } else if (choice == 3) {
                        System.out.println("Your choice is George Wassouf.");
                        finalPrice += 50;
                    } else {
                        System.out.println("Invalid song choice.");
                    }

                    System.out.println("Final price including selected song: " + finalPrice);
                }

                input.close();
                return;
            }
        }

        System.out.println("Sorry, invalid book name.");
        input.close();
    }
}