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From: stew%lhasa@HUCSC.HARVARD.EDU.UUCP
Newsgroups: mod.computers.vax
Subject: Re: Null arguments in VMS fortran
Message-ID: <8701021845.AA05612@ucbvax.Berkeley.EDU>
Date: Fri, 2-Jan-87 12:32:30 EST
Article-I.D.: ucbvax.8701021845.AA05612
Posted: Fri Jan  2 12:32:30 1987
Date-Received: Fri, 2-Jan-87 18:49:46 EST
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The subroutine with the null argument can check for that by
comparing %ADDR(X) to zero.  Generally, this form is only used
in calling system services which take optional arguments.
Needless to say, the %ADDR feature makes you VMS dependant.

Stew