Task: Number reversal game





Java: import java.util.List;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.Collections;


public class ReversalGame {
    private List<Integer> gameList;

    public ReversalGame() {
        initialize();
    }

    public void play() throws Exception {
        int i = 0;
        int moveCount = 0;
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println(gameList);
            System.out.println("Please enter a index to reverse from 2 to 9. Enter 99 to quit");
            i = scanner.nextInt();
            if (i == 99) {
                break;
            }
            if (i < 2 || i > 9) {
                System.out.println("Invalid input");
            } else {
                moveCount++;
                reverse(i);
                if (isSorted()) {
                    System.out.println("Congratulations you solved this in " + moveCount + " moves!");
                    break;
                }
            }

        }
        scanner.close();
    }

    private void reverse(int position) {
        Collections.reverse(gameList.subList(0, position));
    }

    private boolean isSorted() {
        for (int i=0; i < gameList.size() - 1; ++i) {
            if (gameList.get(i).compareTo(gameList.get(i + 1)) > 0) {
                return false;
            }
        }
        return true;
    }

    private void initialize() {
        this.gameList = new ArrayList<Integer>(9);
        for (int i=1; i < 10; ++i) {
            gameList.add(i);
        }
        while (isSorted()) {
            Collections.shuffle(gameList);
        }
    }


    public static void main(String[] args) {
        try {
            ReversalGame game = new ReversalGame();
            game.play();
        } catch (Exception e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        }
    }
}


PHP: class ReversalGame {
    private $numbers;
 
    public function __construct() {
        $this->initialize();
    }
 
    public function play() {
        $i = 0;
        $moveCount = 0;
        while (true) {
            echo json_encode($this->numbers) . "\n";
            echo "Please enter an index to reverse from 2 to 9. Enter 99 to quit\n";
            $i = intval(rtrim(fgets(STDIN), "\n"));
            if ($i == 99) {
                break;
            }
            if ($i < 2 || $i > 9) {
                echo "Invalid input\n";
            } else {
                $moveCount++;
                $this->reverse($i);
                if ($this->isSorted()) {
                    echo "Congratulations you solved this in $moveCount moves!\n";
                    break;
                }
            }
 
        }
    }
 
    private function reverse($position) {
        array_splice($this->numbers, 0, $position, array_reverse(array_slice($this->numbers, 0, $position)));
    }
 
    private function isSorted() {
        for ($i = 0; $i < count($this->numbers) - 1; ++$i) {
            if ($this->numbers[$i] > $this->numbers[$i + 1]) {
                return false;
            }
        }
        return true;
    }
 
    private function initialize() {
        $this->numbers = range(1, 9);
        while ($this->isSorted()) {
            shuffle($this->numbers);
        }
    }
    
}

$game = new ReversalGame();
$game->play();