String format to 2 digit zero padding numbers

[pixbyte]

I have a question about string format. I need to format a date to a String with zero padding.
Like 2020.01.27

I use

QString strCreationTime = QString("%1.%2.%3 %4:%5:%6").arg(QString::number(pISOVolumeInfo.sInfoEx.ISOCreationDateTime.nDay), 
QString::number(pISOVolumeInfo.sInfoEx.ISOCreationDateTime.nMonth),
QString::number(pISOVolumeInfo.sInfoEx.ISOCreationDateTime.nYear+1900),
QString::number(pISOVolumeInfo.sInfoEx.ISOCreationDateTime.nHour), QString::number(pISOVolumeInfo.sInfoEx.ISOCreationDateTime.nMinute),
QString::number(pISOVolumeInfo.sInfoEx.ISOCreationDateTime.nSecond));

How is it possible to bring one digit numbers to 2 digit zero padding? Something like sprintf possible with QString?

[aha_1980]

As @J-Hilk said, there are overloads like this:

QString number = QString("%1.%2").arg(number, 2, 10, QLatin1Char('0')).arg(number2, 2, 10, QLatin1Char('0');

But it may be easier if you convert your ISOCreationDateTime into QDateTime and use the string formating from there?

Regards

[J.Hilk]

@pixbyte please read the documentation
https://doc.qt.io/qt-5/qstring.html

arg has multiple overloads, more than one allows you to add 0 padding

[pixbyte]

You are right but I so not know how to use with this multiple formating %1%2%3, for one, just like %1 it is easy.

[aha_1980]

As @J-Hilk said, there are overloads like this:

QString number = QString("%1.%2").arg(number, 2, 10, QLatin1Char('0')).arg(number2, 2, 10, QLatin1Char('0');

But it may be easier if you convert your ISOCreationDateTime into QDateTime and use the string formating from there?

Regards