menu

int main() {
    int hwNumber;
    while (true) {
    MENU:
        cout << "Введите номер ДЗ (1-4): ";
        cin >> hwNumber;
        switch (hwNumber)
        {
        case 1:
            break;
        case 0:
            goto END;
            break;
        default:
            cout << "ERROR!" << endl;
            break;
        }
    }
    END:
    return 0;
}