Help with QString

[ProgrammerAtHeart3344]

I'm trying to print none string values using QString but can't figure out how it's done, I remember it being like this:
@
QString str = QString("%, %").arg(centeralRect->left()).arg(centeralRect->top());@

but that doesn't really print what I expected.

!http://puu.sh/3jKrc.jpg()!

[ChrisW67]

Markers are %1, %2 etc.
"QString::arg()":http://qt-project.org/doc/qt-5.0/qtcore/qstring.html#arg

[ProgrammerAtHeart3344]

ah thanks