DABronskikh · Jul 27, 2022 · Jul 27, 2022 · Oct 26, 2022 · Oct 26, 2022 · Oct 28, 2022
diff --git a/settings.gradle b/settings.gradle
@@ -12,4 +12,4 @@ dependencyResolutionManagement {
         mavenCentral()
     }
 }
-rootProject.name = "BillCalculator"
+rootProject.name = "Java-Module-Project"
diff --git a/src/main/java/InvoiceCalculator.java b/src/main/java/InvoiceCalculator.java
@@ -0,0 +1,140 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class InvoiceCalculator {
+    protected ArrayList<Product> products = new ArrayList<>();
+    protected int countUsers;
+
+    public void start() {
+        this.requestCountUsers();
+        this.addProducts();
+        this.printProducts();
+        this.printResults();
+    }
+
+    public void requestCountUsers() {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("На скольких человек необходимо разделить счёт?");
+
+        String input;
+        while (true) {
+            input = scanner.nextLine();
+            if (isInt(input) && Integer.parseInt(input) > 1) {
+                break;
+            } else {
+                System.out.println("Кол-во должно быть больше 1");
+                System.out.println("Повторите ввод:");
+            }
+        }
+
+        this.countUsers = Integer.parseInt(input);
+    }
+
+    public void addProducts() {
+        Scanner scanner = new Scanner(System.in);
+        while (true) {
+            System.out.println("Добавьте новый товар или введите \"Завершить\"");
+            String productTitle;
+            double productPrice;
+            String input;
+
+            System.out.println("Введите название товара:");
+            input = scanner.nextLine();
+            if (checkEnd(input)) {
+                break;
+            }
+            productTitle = input;
+
+            while (true) {
+                System.out.println("Введите цену товара:");
+                input = scanner.nextLine();
+                if (isDouble(input)) {
+                    productPrice = Double.parseDouble(input);
+                    break;
+                }
+                System.out.println("Некорректное значение");
+            }
+
+            Product product = new Product(productTitle, productPrice);
+            this.products.add(product);
+        }
+    }
+
+    public void printProducts() {
+        System.out.printf("%n -=-=-=-=-=-=-=- %n");
+
+        if (this.products.size() == 0) {
+            System.out.println("Список товаров пуст...");
+        } else {
+            double sum = 0;
+            System.out.println("Добавленные товары:");
+            for (int i = 0; i < this.products.size(); i++) {
+                Product product = this.products.get(i);
+                System.out.printf("%d) %s%n", i + 1, product);
+                sum += product.price;
+            }
+            System.out.printf("Всего товаров: %s шт. на сумму %.2f%n", this.products.size(), sum);
+        }
+    }
+
+    public double getAvgSum() {
+        double sum = 0;
+        if (this.products.size() == 0) {
+            return 0;
+        } else {
+            for (int i = 0; i < this.products.size(); i++) {
+                sum += this.products.get(i).price;
+            }
+            return sum / this.countUsers;
+        }
+    }
+
+    public String getRubAddition(double sum) {
+        String rubAddition = "рублей";
+        int sumInt = (int) sum;
+        int preLastDigit = sumInt % 100 / 10;
+        if (preLastDigit == 1) {
+            return rubAddition;
+        }
+
+        switch (sumInt % 10) {
+            case 1:
+                return "рубль";
+            case 2:
+            case 3:
+            case 4:
+                return "рубля";
+            default:
+                return rubAddition;
+        }
+    }
+
+    public void printResults() {
+        double avgSum = this.getAvgSum();
+        String getRubAddition = this.getRubAddition(avgSum);
+        System.out.printf("Итого: %.2f %s на человека%n", avgSum, getRubAddition);
+    }
+
+    public static boolean isInt(String input) throws NumberFormatException {
+        try {
+            Integer.parseInt(input);
+            return true;
+        } catch (NumberFormatException e) {
+            return false;
+        }
+    }
+
+    public static boolean isDouble(String input) throws NumberFormatException {
+        try {
+            Double.parseDouble(input);
+            return true;
+        } catch (NumberFormatException e) {
+            return false;
+        }
+    }
+
+    public static boolean checkEnd(String input) {
+        return "завершить".equals(input.trim().toLowerCase());
+    }
+
+}
diff --git a/src/main/java/Main.java b/src/main/java/Main.java
@@ -1,6 +1,6 @@
-public class Main {
-
+class Main {
     public static void main(String[] args) {
-        // ваш код начнется здесь
+        InvoiceCalculator invoiceCalculator = new InvoiceCalculator();
+        invoiceCalculator.start();
     }
 }
diff --git a/src/main/java/Product.java b/src/main/java/Product.java
@@ -0,0 +1,13 @@
+public class Product {
+    String title;
+    double price;
+
+    public Product(String title, double price) {
+        this.title = title;
+        this.price = price;
+    }
+
+    public String toString() {
+        return String.format("%s: %.2f", title, price);
+    }
+}