C++ (Qt)
QString Widget::passwordRand(qint64 min, qint64 max)
{
    QString chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
    QString password;
    qint64 amount = mt_rand(min, max);
    for (int i = 0; i < amount; i++) {
        int num = qrand() % chars.size();
        password += chars.at(num);
    }
    return password;
}
 
qint64 Widget::mt_rand(qint64 a, qint64 b)
{
    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
    return qrand()%(b-a+1)+a;
}

C++ (Qt)
[b]qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));[/b]

C++ (Qt)
QByteArray md5Hash = QCryptographicHash::hash("some_login", QCryptographicHash::Md5);