исправить код

[PANDAGOR]

помогите исправить баги
чтобы хвост когда много съесть фруктов и залезть саму на себя граница карты не смещалась. Помогите пожалуйста С++

#include <iostream>
#include <conio.h>
using namespace std;
 
bool gameOver;
bool flag = false;
const int width = 20;
const int height = 20;
int x, y, fruitX, fruitY, score;
int tailX[100], tailY[100];
int nTail;
enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN };
eDirection dir;
 
 
void Setup() {
    gameOver = false;
    dir = STOP;
    x = width / 2 - 1;
    y = height / 2 - 1;
    fruitX = rand() % width;
    fruitY = 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;
                        if (!flag)
                            cout << "o";
                    }
                }
                if (!print)
                    cout << " ";
            }
        }
        cout << endl;
    }
    for (int i = 0; i < width + 1; i++)
        cout << "#";
    cout << endl;
    cout << "Score: " << score << endl;
}
 
void Imput() {
    if (_kbhit()) {
        switch (_getch())
        {
        case 'a':
            dir = LEFT;
            break;
        case 'd':
            dir = RIGHT;
            break;
        case 'w':
            dir = UP;
            break;
        case 's':
            dir = DOWN;
            break;
        case 'z':
            dir = STOP;
            break;
        case 'x':
            gameOver = true;
            cout << "GAME OVER!!!";
            break;
        }
    }
}
 
void Logic() {
    flag = false;
    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 LEFT:
        x--;
        break;
    case RIGHT:
        x++;
        break;
    case UP:
        y--;
        break;
    case DOWN:
        y++;
        break;
    }
 
    //if (x > width || x < 0 || y > height || y < 0)
        //gameOver = true;
    if (x >= width - 1) {
        x--;
        if (y >= height)
            y++;
        else
            y--;
        dir = LEFT;
    }
    else if (x < 0) {
        x++;
        if (y >= height)
            y--;
        else
            y++;
        dir = RIGHT;
    }
 
    if (y >= height) {
        y--;
        x++;
        dir = UP;
    }
    else if (y < 0) {
        y++;
        x--;
        dir = DOWN;
    }
 
    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++;
        flag = true;
    }
}
 
int main() {
    Setup();
    while (!gameOver) {
        Draw();
        Imput();
        Logic();
    }
    return 0;
}