c++ - How i can change number that displaying on QPushButton? -

i have qpushbutton, button has text on it, text number. in slot of object want change number displayed on button, when call

mybutton->settext(qstring("%1").arg(number)); 

or

qstring tmp; tmp.setnum(number); mybutton->settext(tmp); 

text on button dosen't changes. when call

mybutton->settext("some random text"); 

it works fine. how can change number displaying on button?

part of code:

sortwindow::sortwindow(qwidget *parrent) { ... mybutton = new qpushbutton; qstring tmp(qstring("%1").arg(number)); mybutton.settext(tmp); ... } 

and

void sortwindow::workonsignal(int index) { ... if (something) { ... qstring tmp; tmp.setnum(number); mybutton->settext(tmp); ... } 

type of number must int. work properly.

#include <qapplication> #include <qpushbutton>  int main(int argc,char **argv) {     qapplication app(argc,argv);      qpushbutton *pd = new qpushbutton;     pd->settext(qstring("%1").arg(1234));     pd->show();      return app.exec(); }