add these to ~/.profile & ~/.bashrc

export QTDIR=/usr/lib/qt3
export PATH=$QTDIR/bin:$PATH
export MANPATH=$QTDIR/doc/man:$MANPATH
export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH


QT likes to be compiled from a virtual terminal.  It frequently 
gets confused if make is run from an Xterm.  (ctrl-alt-F2) or 
something first!

In the directory holding the .cpp file:

qmake -project
qmake
make

WOO!