Qt refreshing label on mini2440

I am trying this on mini2440. I want to create a label dynamically in a
program using code (without creating a form) and refresh label's text
dynamically (number of labels and text is going to be dynamically decided
in the program, so can't use form). Is there a way to do that? Currently I
am doing it following way (skipped some details in the program):

//create label
Qlabel *label = new Qlabel();
label->setText("message1"); 
// set font etc of the label here 
// show label
label->show();
for(;;)
{
 //Do some activity
 label->setText("message2"); // display some message
 label->repaint();
 label->update(); 
}

It doesn't seem to be working. The label seems to be showing only the very
last message and not the intermediate ones. Can someone please suggest me a
proper way to do it?

Thanks in advance!

This is not the forum for this type of question (general programming), you
should try www.stackoverflow.com

With that said, you are not giving the new label a parent, so it doesn't
know where to draw itself.

Qlabel *label = new Qlabel(my_parent_widget_where_i_want_it_drawn);

- vk