Thread Problems (i think)

[marcel]

cout works only on stdout, so you need to tell qmake this is a console app.
Therefore add CONFIG += debug console to the pro file.

In a GUI app you can try to output something to cerr. It might work.

[wysota]

std::endl is not obligatory at all

But lack of it prevents the output buffer from being flushed. Try adding it like J-P suggested.

cout works only on stdout, so you need to tell qmake this is a console app.
Therefore add CONFIG += debug console to the pro file.

In a GUI app you can try to output something to cerr. It might work.

He's using Linux, so that's not the case here. That is why I asked about the OS he uses.