Написал змейку на С++ подскажите почему змея не двигается после запуска?

    #include <iostream>
    #include <conio.h>
    #include <stdio.h>
    #include <unistd.h>
    using namespace std;
    bool gameOver;
    int x, y, score;
    int fruitX, fruitY;
    const int width = 50;
    const int height = 30;
    int tailX[100], tailY[100];
    int ntail;
    int i, j;
    enum eDirection
    {
        STOP = 0,
        left,
        right,
        up,
        down
    };
    eDirection dir;
    void setup()
    {
        gameOver = false;
        dir = eDirection::STOP;
        x = width / 2 - 1;
        y = height / 2 - 1;
        fruitX = rand() % width;
        fruitX = rand() % height;
        score = 0;
    }
    void draw()
    {
        system("cls");
        for (int i = 0; i < width + 1; i++)
           cout << "#";
        cout << endl;
        for (int i = 0; i < height; i++)
        {
         for (int j = 0; j < width; j++)
         {
             if (j == 0 || j == width - 1)
                 cout << "#";
             if (i == y && j == x)
                 cout << "0";
             else if (i == fruitY && j == fruitX)
                 cout << "f";
                else
                {
                    bool print = false;
            for (int k = 0; k < ntail; k++)
            {
                if (tailX[k] == j && tailY[k] == i)
                {
                    print = true;
                    cout << "o";
                }
            }
            if (!print)
                cout << " ";
        }
    }
    cout << endl;
}
for (int i = 0; i < width + 1; i++)
    cout << "#";
    cout << endl;
    }
    void input()
    {
        if (_kbhit())
        {   
            switch (_getch())
            {
            case 'a':
                dir = eDirection::left;
                break;
            case 'd':
                dir = eDirection::right;
                break;
            case 'w':
                dir = up;
                break;
            case 's':
                dir = down;
                break;
            case 'x':
                gameOver = true;
                break;
           }
        }
    }
    void logic()
    {
        int prevX = tailX[0];
        int prevY = tailY[0];
        int prev2X, prev2Y;
        tailX[0] = x;
        tailY[0] = y;
        for (int i = 1; i < ntail; i++)
        {
            prev2X = tailX[i];
            prev2Y = tailY[i];
            tailX[i] = prevX;
            tailY[i] = prevY;
            prevX = prev2X;
            prevY = prev2Y;
            switch (dir)
            {
            case eDirection::left:
                x--;
                sleep(1);
                break;
            case eDirection::right:
                x++;
                sleep(1);
                break;
            case up:
                y--;
                sleep(1);
                break;
            case down:
                y++;
                sleep(1);
                break;
            }
            //if (x > width || x < 0 || y > height || y < 0)
            //gameOver = true;
            if (x >= width)
                x = 0;
            else if (x < 0)
                x = width - 1;
            for (int i = 0; i < ntail; i++)
            {
                if (tailX[i] == x && tailY[i] == y)
                    gameOver = true;
            }
            if (x == fruitX && y == fruitY)
            {
                score == 10;
                fruitX = rand() % width;
                fruitY = rand() % height;
                ntail++;
            }
        }
    }
    int main()
    {
        setup();
        while (!gameOver)
        {
            draw();
            input();
            logic();
        }
    }