🚀 go-pugleaf

In article <Bz9C2z.Cno@pgroup.com>, lfm@pgroup.com (Larry Meadows) writes:
	> I haven't seen this mentioned -- in VMS Fortran, logicals are TRUE
	> if odd and FALSE if even.  Someone said that BLISS was the same way.
	> Of course, this gives fits when mixing Fortran and C, or trying to
	> retain VMS Fortran compatibility on non-VMS systems.

What ARE you talking about?  FORTRAN has a first-class Boolean datatype, which
has exactly two values in its value space:  .TRUE. and .FALSE. .  Boolean
values are neither odd nor even; they are just plain not arithmetic.  You
can't use arithmetic values in Boolean contexts, nor can you use Booleans in
arithmetic contexts.  The internal representation of a Boolean is simply not
observable, unless you play inherently non-portable games (like overlaying an
INTEGER with a LOGICAL).

The standard internal representations for truth and falsehood in both VAX C
and FORTRAN are 1 and 0.  Any function in either that returns a Boolean will
be treated by the other has having the appropriate meaning.

Don't judge the whole world by C standards; it'll just give you a headache.

							-- Jerry