Wait for key before exit in console app

[R-Type]

Hello,
I've simple console application and cannot find solution how to wait for some key before exit from it. It's simple with getchar() or std::cin.ignore, but I want to do it with Qt, because for console communication I already use it:

int main() {
    QTextStream cout(stdout);
    QTextStream cin(stdin);
// ...
    cout << "Press <ENTER> to exit." << endl;
    forever {
        QString Line = cin.readLine();
        if (!Line.isNull()) {
            break;
        }
    }
    return 0;
}

int main() {
    QTextStream cout(stdout);
    QTextStream cin(stdin);
// ...
    cout << "Press <ENTER> to exit." << endl;
    forever {
        QString Line = cin.readLine();
        if (!Line.isNull()) {
            break;
        }
    }
    return 0;
}

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Code inside forever was taken from stackoverflow, but doesn't work for me. Qt 4.7.3
Do you know some other solutions?