Tic-Tac-Toe

#include <iostream>
#include <string>

using namespace std;

void alreadeGetted()
{
    cout << "Эта клетка уже занята, вы получили следующую клетку, либо пропустили ход" << endl;
}

int main()
{
    string places[3][3] =
    {{"&"," & ","&"},
     {"&"," & ","&"},
     {"&"," & ","&"}};

    for(int i = 0; i <= 2; i++){
        for(int j = 0; j <= 2; j++)
            cout << places[i][j];
        cout << endl;}
    int x, o;
    short z = 1;
    while(z <= 9)
    {
        cout << "X, выберите вашу клетку: ";
        cin >> x;
        switch(x)
        {
            case 1:
            if (places[0][0] != "O"){
                places[0][0] = "X";
                break;
            } else alreadeGetted();
            case 2:
            if (places[0][1] != " O "){
                places[0][1] = " X ";
                break;
            } else alreadeGetted();
            case 3:
            if (places[0][2] != "O"){
                places[0][2] = "X";
                break;
            } else alreadeGetted();
            case 4:
            if (places[1][0] != "O"){
                places[1][0] = "X";
                break;
            } else alreadeGetted();
            case 5:
            if (places[1][1] != " O "){
                places[1][1] = " X ";
                break;
            } else alreadeGetted();
            case 6:
            if (places[1][2] != "O"){
                places[1][2] = "X";
                break;
            } else alreadeGetted();
            case 7:
            if (places[2][0] != "O"){
                places[2][0] = "X";
                break;
            } else alreadeGetted();
            case 8:
            if (places[2][1] != " O "){
                places[2][1] = " X ";
                break;
            } else alreadeGetted();
            case 9:
            if (places[2][2] != "O"){
                places[2][2] = "X";
                break;
            } else alreadeGetted();
            case 1337:
            places[0][0] = "X";
            places[1][0] = "X";
            places[2][0] = "X";
            break;
        }
        system("cls");
        z++;
        for(int i = 0; i <= 2; i++){
            for(int j = 0; j <= 2; j++)
                cout << places[i][j];
            cout << endl;}

        if((places[0][0] == "X" && places[0][1] == " X " && places[0][2] == "X") ||
           (places[1][0] == "X" && places[1][1] == " X " && places[1][2] == "X") ||
           (places[2][0] == "X" && places[2][1] == " X " && places[2][2] == "X") ||
           (places[0][0] == "X" && places[1][0] == "X" && places[2][0] == "X") ||
           (places[0][1] == " X " && places[1][1] == " X " && places[2][1] == " X ") ||
           (places[0][2] == "X" && places[1][2] == "X" && places[2][2] == "X") ||
           (places[0][0] == "X" && places[1][1] == " X " && places[2][2] == "X") ||
           (places[0][2] == "X" && places[1][1] == " X " && places[2][0] == "X"))
        {
            cout << "Победили X!" << endl;
            goto END;
        }

        cout << "O, выберите вашу клетку: ";
        cin >> o;
        switch(o)
        {
            case 1:
            if (places[0][0] != "X"){
                places[0][0] = "O";
                break;
            } else alreadeGetted();
            case 2:
            if (places[0][1] != " X "){
                places[0][1] = " O ";
                break;
            } else alreadeGetted();
            case 3:
            if (places[0][2] != "X"){
                places[0][2] = "O";
                break;
            } else alreadeGetted();
            case 4:
            if (places[1][0] != "X"){
                places[1][0] = "O";
                break;
            } else alreadeGetted();
            case 5:
            if (places[1][1] != " X "){
                places[1][1] = " O ";
                break;
            } else alreadeGetted();
            case 6:
            if (places[1][2] != "X"){
                places[1][2] = "O";
                break;
            } else alreadeGetted();
            case 7:
            if (places[2][0] != "X"){
                places[2][0] = "O";
                break;
            } else alreadeGetted();
            case 8:
            if (places[2][1] != " X "){
                places[2][1] = " O ";
                break;
            } else alreadeGetted();
            case 9:
            if (places[2][2] != "X"){
                places[2][2] = "O";
                break;
            } else alreadeGetted();
            case 1337:
            places[0][0] = "O";
            places[1][0] = "O";
            places[2][0] = "O";
            break;
        }
        system("cls");
        z++;
        for(int i = 0; i <= 2; i++){
            for(int j = 0; j <= 2; j++)
                cout << places[i][j];
            cout << endl;}

        if((places[0][0] == "O" && places[0][1] == " O " && places[0][2] == "O") ||
           (places[1][0] == "O" && places[1][1] == " O " && places[1][2] == "O") ||
           (places[2][0] == "O" && places[2][1] == " O " && places[2][2] == "O") ||
           (places[0][0] == "O" && places[1][0] == "O" && places[2][0] == "O") ||
           (places[0][1] == " O " && places[1][1] == " O " && places[2][1] == " O ") ||
           (places[0][2] == "O" && places[1][2] == "O" && places[2][2] == "O") ||
           (places[0][0] == "O" && places[1][1] == " O " && places[2][2] == "O") ||
           (places[0][2] == "O" && places[1][1] == " O " && places[2][0] == "O"))
        {
            cout << "Победили O!" << endl;
            goto END;
        }
    }
    cout << "Ничья." << endl;
    END:
    short ans;
    cout << "Выбери: \n"
         << "[1] Новая игра\n"
         << "[2] Выйти\n";
    cin >> ans;
    if (ans == 1)
    {
         system("cls");
         return main();
    }
    else if (ans == 2)
    {
          system("cls");
          cout << "Ты вышел из игры\n";
          return 0;
    }
}