import java.util.Scanner; public class Main { private static final Scanner scan = new Scanner(System.in); public static void main(String[] args) { Calculator.inputPersons(); Calculator.addProducts(); Calculator.payPeople(); } public static class Calculator { static double totalPrice = 0; static String names = ""; static int persons = 0; public static void inputPersons() { while (true) { System.out.println("How many persons?"); if (scan.hasNextInt()) { persons = scan.nextInt(); if (persons <= 1) { System.out.println("Amount of persons must be integer > 1. Try again."); continue; } break; } else { System.out.println("Amount of persons must be integer > 1. Try again."); scan.nextLine(); continue; } } } public static void addProducts() { while (true) { System.out.println("Product name: "); String name = scan.next() + scan.nextLine(); System.out.println("Price: "); if (scan.hasNextDouble()) { double price = scan.nextDouble(); if (price < 0) { System.out.println("Price must be positive double! Try again"); continue; } totalPrice += price; names += name + "\n"; } else { System.out.println("Price must be positive double! Try again"); scan.nextLine(); continue; } System.out.println("Product " + name + " successfully added! Enough? (yes - any symbol/no - n): "); String answer = scan.next(); if (answer.equalsIgnoreCase("n")) { continue; } else {break;} } } public static void payPeople() { int ruble = (int) Math.floor(totalPrice); int payPeople = (int) Math.floor(totalPrice/persons); System.out.println("Вы заказали следующие продукты:\n" + names + "на сумму: " + totalPrice + " " + Calculator.payPeoples(ruble)); System.out.println("Каждый из " + persons + " человек заплатит по " + String.format("%.2f", totalPrice/persons) + " " + Calculator.payPeoples(payPeople)); } static String payPeoples(int ruble) { if (ruble % 100 / 10 == 1) { return "рублей"; } else { switch (ruble % 10) { case 1 : return "рубль"; case 2: case 3: case 4: return "рубля"; default: return "рублей"; } } } } }