Menu:
// Menu
cout << "*******************************n";
cout << "You wanna:n";
cout << "1. Register?n";
cout << "orn";
cout << "2. Login?n";
cout << "Enter your choice and press enter: ";
cin >> choice;

switch (choice)
{
    case 1:
    // Check if person is registered
    if (_nick.size() > 0 ) {
        system("CLS");
        cout << "*******************************nn" << "You are already registered!nn";
        goto Menu;
    }
    // Register
    system("CLS");
    cout << "Please select a username:" << endl;
    cin >> _nick;
    cout << "Please select a password:" << endl;
    cin >> _pass;
    goto Menu;
    system("CLS");
    cout << "*******************************nn" << "Successfuly registered!nn";

    case 2:
    // Check if person is registered
    system("CLS");
    if (_nick.size() == 0) {
        system("CLS");
        cout << "*******************************nn" << "You are not registered!nn";
        goto Menu;
    }
    // Login
    cout << "Please enter in your nickname:" << endl;
    cin >> nick;
    if (nick != _nick) {
        system("CLS");
        cout << "*******************************nn" << "Bad nickname!nn";
        goto Menu;
    } else {
    cout << "Please enter in your password:" << endl;
    cin >> pass;
    }
    if (pass != _pass) {
        system("CLS");
        cout << "*******************************nn" << "Bad password!nn";
        goto Menu;
    }
    if ((pass == _pass) && (nick == _nick)) {
    // Logged in
    system ("CLS");
    cout << "Welcome!nn";
    }

    default:
        cout << "*******************************nn" << "Something went wrong!nn";
        goto Menu;
        break;
}
system("PAUSE");
return 0;