main.java

import java.util.Scanner;
class GroundFloor {

    Scanner h = new Scanner(System.in);
    float total = 0;

    String[] items = {"1.Apple", "2.Banana", "3.Cherry", "4.Tomato", "5.Potato", "6.Onion"};
    int[] price = {100, 40, 90, 50, 30, 60};

    void fruits_Vegetables() {
        char choice;
        do {
            System.out.println(" Ground Floor : Fruits & Vegetables ");
            for (int i = 0; i < items.length; i++) {
                System.out.println(items[i] + " : Rs." + price[i] + " per kg");
            }

            System.out.print("Choose item number: ");
            int item = h.nextInt();

            System.out.print("Enter quantity kg: ");
            int kg = h.nextInt();
            total += price[item-1] * kg;

            System.out.print("Buy another item here(y/n): ");
            choice = h.next().charAt(0);

        } while (choice == 'y');
    }
}


class FirstFloor extends GroundFloor {

    String[] clothes = {"1.Shirt", "2.Pant", "3.T-Shirt", "4.Bodycon"};
    int[] clothPrice = {1800, 1600, 1500, 2500};

    void clothing() {
        char choice;
        do {
            System.out.println(" First Floor : Clothing ");
            for (int i = 0; i < clothes.length; i++) {
                System.out.println(clothes[i] + " : Rs." + clothPrice[i]);
            }

            System.out.print("Choose cloth number: ");
            int c = h.nextInt();
            total += clothPrice[c-1];

            System.out.print("Buy another cloth (y/n): ");
            choice = h.next().charAt(0);

        } while (choice == 'y');
    }
}


class SecondFloor extends FirstFloor {

    String[] groceries = {"1.Rice", "2.Oil", "3.Sugar", "4.Flour"};
    int[] groceryPrice = {120, 100, 150, 70};

    void grocery() {
        char choice;
        do {
            System.out.println(" Second Floor : Groceries ");
            for (int i = 0; i < groceries.length; i++) {
                System.out.println(groceries[i] + " : Rs." + groceryPrice[i] + " per kg");
            }

            System.out.print("Choose grocery number: ");
            int g = h.nextInt();

            System.out.print("Enter quantity kg: ");
            int kg = h.nextInt();
            total += groceryPrice[g-1] * kg;

            System.out.print("Buy another grocery (y/n): ");
            choice = h.next().charAt(0);

        } while (choice == 'y');
    }
}


class Billing extends SecondFloor {

    void bill() {
        h.nextLine(); 

        System.out.println(" BILL ");
        System.out.print("Enter Customer Name: ");
        String name = h.nextLine();

        System.out.print("Enter Phone Number: ");
        String phone = h.nextLine();

        System.out.println("Customer Name : " + name);
        System.out.println("Phone Number  : " + phone);
        System.out.println("Total Amount  : Rs." + total);
        System.out.println("Thank You Visit Again !!!");
    }
}


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

        Scanner s = new Scanner(System.in);
        Billing p = new Billing();
        int choice;

        do {
            System.out.println(" SHREE'S SUPERMARKET  ");
            System.out.println("1.Ground Floor (Fruits & Vegetables)");
            System.out.println("2.First Floor (Clothing)");
            System.out.println("3.Second Floor (Groceries)");
            System.out.println("4.Billing");
            System.out.println("5.Exit");
            System.out.print("Enter your choice: ");

            choice = s.nextInt();

            switch (choice) {

                case 1:
                    p.fruits_Vegetables();
                    break;

                case 2:
                    p.clothing();
                    break;

                case 3:
                    p.grocery();
                    break;

                case 4:
                    p.bill();
                    return;

                case 5:
                    System.out.println("Thank you for purchasing!");
                    break;

                default:
                    System.out.println("Invalid choice!");
            }

        } while (choice != 5);
    }
}