How portable is 0.0/0.0 in 2003? Under gcc3.2, -math.h -> bits/nan.h defines NAN. -There is also the C99 function nan(), which returns NaN if quiet NaNs are supported. Are quiet NaN's supported on all KDE supported platforms? cbn On Sunday 15 June 2003 12:58 pm, George Staikos wrote: > +double KST::NOPOINT = 0.0/0.0; // NaN