finish

TwentyMatchsticksGame.iml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+

src/Game.java

@@ -0,0 +1,71 @@
+import java.util.Scanner;
+
+public class Game {
+    private static final int INITIAL_MATCHSTICKS = 20;
+    private static final int THREE_MATCHSTICKS = 3;
+    private static final int TWO_MATCHSTICKS = 2;
+    private static final int ONE_MATCHSTICK = 1;
+    int amountOfMatchsticks;
+
+    Game() {
+        this.amountOfMatchsticks = INITIAL_MATCHSTICKS;
+    }
+
+    static void takeFirstStep(Game game) {
+        game.amountOfMatchsticks -= THREE_MATCHSTICKS;
+        MessageOutput.announceComputerSelectedMatchsticks(THREE_MATCHSTICKS);
+    }
+
+    static void takeNextStep(Game game) {
+        if (game.amountOfMatchsticks % 2 != 0) {
+            game.amountOfMatchsticks -= TWO_MATCHSTICKS;
+            MessageOutput.announceComputerSelectedMatchsticks(TWO_MATCHSTICKS);
+        } else if (game.amountOfMatchsticks % 4 == 0) {
+            game.amountOfMatchsticks -= THREE_MATCHSTICKS;
+            MessageOutput.announceComputerSelectedMatchsticks(THREE_MATCHSTICKS);
+        } else {
+            game.amountOfMatchsticks--;
+            MessageOutput.announceComputerSelectedMatchsticks(ONE_MATCHSTICK);
+        }
+    }
+
+    private Scanner scanner = new Scanner(System.in);
+
+    private int PlayerStepsAnalysis() {
+        if (scanner.hasNextInt()) {
+            int matchsticksToDelete = scanner.nextInt();
+            if (matchsticksToDelete <= 3 && matchsticksToDelete >= 1) {
+                return matchsticksToDelete;
+            } else {
+                MessageOutput.printWrongAmount();
+            }
+        }
+        return 0;
+    }
+
+    void gameLogic(Game game) {
+        int matchsticksToDelete;
+
+        MessageOutput.announceTheStartOfTheGame();
+        MessageOutput.announceRemainingMatchsticks(amountOfMatchsticks);
+        game.takeFirstStep(game);
+        MessageOutput.announceRemainingMatchsticks(amountOfMatchsticks);
+
+        while (amountOfMatchsticks != 1) {
+            MessageOutput.announcePlayersStep();
+            matchsticksToDelete = PlayerStepsAnalysis();
+            while (matchsticksToDelete == 0) {
+                MessageOutput.announceRemainingMatchsticks(amountOfMatchsticks);
+                MessageOutput.announcePlayersStep();
+                matchsticksToDelete = PlayerStepsAnalysis();
+            }
+            amountOfMatchsticks -= matchsticksToDelete;
+            MessageOutput.announceRemainingMatchsticks(amountOfMatchsticks);
+            game.takeNextStep(game);
+            MessageOutput.announceRemainingMatchsticks(amountOfMatchsticks);
+        }
+        MessageOutput.announceLoser();
+        scanner.close();
+    }
+}
+

src/Main.java

@@ -0,0 +1,7 @@
+public class Main {
+
+    public static void main(String[] args) {
+        Game game = new Game();
+        game.gameLogic(game);// write your code here
+    }
+}

src/MessageOutput.java

@@ -0,0 +1,39 @@
+public class MessageOutput {
+    static void announceTheStartOfTheGame() {
+        System.out.println("Игра началась!");
+    }
+
+    static void announceRemainingMatchsticks(int amount) {
+        switch (amount) {
+            case 4:
+            case 3:
+            case 2: {
+                System.out.printf("На столе осталось %d спички. \n", amount);
+                break;
+            }
+            case 1: {
+                System.out.print("Для игрока осталась последняя спичка. ");
+                break;
+            }
+            default: {
+                System.out.printf("На столе осталось %d спичек. \n", amount);
+            }
+        }
+    }
+
+    static void announcePlayersStep() {
+        System.out.print("-Ход игрока. Введите количество спичек: ");
+    }
+
+    static void announceComputerSelectedMatchsticks(int matchsticks) {
+        System.out.println("-Ход комьпьютера. Количество выбранных компьютером спичек = " + matchsticks + ".");
+    }
+
+    static void announceLoser() {
+        System.out.println("Игрок проиграл!");
+    }
+
+    public static void printWrongAmount() {
+        System.out.println("Некорректное количество спичек! Попробуйте ещё раз.");
+    }
+}