4.4BSD snapshot (revision 8.1); add 1993 to copyright
written by Kirk McKusick; add Berkeley specific copyright notice
update from John Gilmore for gcc
move the text of error messages from ERROR to the functionswhich generate them.
include math.h to insure correct return type
put in include for <math.h> so they will return doubles
date and time created 80/10/30 00:33:45 by mckusick