Xaxaido · Feb 3, 2024 · Feb 4, 2024 · Feb 5, 2024 · Feb 5, 2024 · Feb 5, 2024
diff --git a/src/main/java/Calc.java b/src/main/java/Calc.java
@@ -0,0 +1,67 @@
+import java.util.ArrayList;
+
+public final class Calc {
+
+    private final int personsCount;
+    private double total;
+    private final ArrayList<Product> order;
+    final static String[] valueToFormat = {"рубль", "рубля", "рублей"};
+    private int maxLength = 0;
+
+    public static Calc getInstance(final MyScanner scanner) {
+
+        Calc calc = null;
+
+        while (calc == null) {
+
+            System.out.println("На скольких человек необходимо разделить счёт?");
+
+            int personsCount = scanner.nextInt();
+            if (personsCount >= 2) {
+                calc = new Calc(personsCount, new ArrayList<Product>());
+            } else {
+                MyScanner.errorMessage();
+            }
+
+        }
+
+        return calc;
+
+    }
+
+    public void addProduct(final String name, final double price) {
+
+        Product newProduct = new Product(name, price);
+        order.add(newProduct);
+        total += price;
+        maxLength = Math.max(maxLength, name.length());
+
+    }
+
+    public void printOrder() {
+
+        System.out.println("Добавленные товары:");
+
+        for (Product product : order) {
+            String name = product.getName();
+            double price = product.getPrice();
+            System.out.println(String.format(name + ".".repeat(maxLength - name.length() + 5) + "%.2f" +
+                                            Formatter.formatValue(price, valueToFormat), price));
+        }
+
+        double eachToPay =  total / personsCount;
+        String total = String.format("Сумма к оплате для каждого человека: %.2f %s",
+                                    eachToPay, Formatter.formatValue(eachToPay, valueToFormat));
+        System.out.println("_".repeat(total.length()));
+        System.out.println(total);
+
+    }
+
+    Calc(int personsCount, ArrayList<Product> order) {
+
+        this.personsCount = personsCount;
+        this.order = order;
+
+    }
+
+}
diff --git a/src/main/java/Formatter.java b/src/main/java/Formatter.java
@@ -0,0 +1,21 @@
+public final class Formatter {
+
+    public static String formatValue(final double value, final String[] valueNameToFormat) {
+
+        int roundedValue = (int) Math.floor(value);
+        int preLastNumber = roundedValue % 100 / 10;
+        int lastNumber = roundedValue % 10;
+
+        if (preLastNumber == 1) {
+            return " " + valueNameToFormat[2];
+        }
+
+        return switch (lastNumber) {
+            case 1 -> " " + valueNameToFormat[0];
+            case 2, 3, 4 -> " " + valueNameToFormat[1];
+            default -> " " + valueNameToFormat[2];
+        };
+
+    }
+
+}
diff --git a/src/main/java/Main.java b/src/main/java/Main.java
@@ -1,6 +1,50 @@
-
 public class Main {
+
+    private final static String STOP_WORD = "Завершить";
+
     public static void main(String[] args) {
-        System.out.println("Hello world!");
+
+        MyScanner scanner = new MyScanner(System.in);
+        String productName;
+        double price;
+        boolean isStop;
+        Calc calc = Calc.getInstance(scanner);
+
+        do {
+
+            System.out.println("Введите название товара");
+            productName = scanner.next();
+
+            while (true) {
+
+                System.out.println("Введите стоимость товара");
+                price = scanner.nextDouble();
+
+                if (price < 0) {
+                    MyScanner.errorMessage();
+                } else {
+                    isStop = newProductOrStop(scanner, calc, productName, price);
+                    break;
+                }
+
+            }
+
+        } while (!isStop);
+
+        calc.printOrder();
+        scanner.close();
+
     }
+
+    private static boolean newProductOrStop(final MyScanner scanner, final Calc calc, final String productName, final double price) {
+
+        calc.addProduct(productName, price);
+        System.out.println(String.format("Товар '%s' стоимостью %.2f %s успешно добавлен",
+                                        productName, price, Formatter.formatValue(price, Calc.valueToFormat)));
+        System.out.println("Хотите добавить ещё товар?\nДля продолжения введите любой символ\nДля отображения счёта введите '" + STOP_WORD + "'");
+
+        return scanner.next().equalsIgnoreCase(STOP_WORD);
+
+    }
+
 }
diff --git a/src/main/java/MyScanner.java b/src/main/java/MyScanner.java
@@ -0,0 +1,40 @@
+import java.io.InputStream;
+import java.util.Scanner;
+
+public final class MyScanner {
+
+    private final Scanner scanner;
+
+    public String next() { return scanner.next(); }
+
+    public int nextInt() { return (int) nextDouble(); }
+
+    public double nextDouble() {
+        return readValue(scanner.next());
+    }
+
+    private double readValue(final String value) {
+
+        double newValue;
+
+        try {
+            newValue = Double.parseDouble(value);
+        } catch(NumberFormatException e) {
+            newValue = -1;
+        }
+
+        return newValue;
+
+    }
+
+    public void close() {
+        scanner.close();
+    }
+
+    public static void errorMessage() { System.out.println("Недопустимый ввод, попробуйте ещё раз"); }
+
+    public MyScanner(InputStream in) {
+        this.scanner = new Scanner(in);
+    }
+
+}
diff --git a/src/main/java/Product.java b/src/main/java/Product.java
@@ -0,0 +1,17 @@
+public final class Product {
+
+    private final String name;
+    private final double price;
+
+    public String getName() { return this.name; }
+
+    public double getPrice() { return this.price; }
+
+    Product(String name, double price) {
+
+        this.name = name;
+        this.price = price;
+
+    }
+
+}