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From: conrad@UCSF-CGL.ARPA (Conrad Huang)
Newsgroups: mod.computers.vax
Subject: VMS C help needed
Message-ID: <8602070150.AA10267@ucsf-cgl.ARPA>
Date: Thu, 6-Feb-86 20:50:53 EST
Article-I.D.: ucsf-cgl.8602070150.AA10267
Posted: Thu Feb  6 20:50:53 1986
Date-Received: Sun, 9-Feb-86 06:11:29 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Approved: info-vax@sri-kl.arpa

I've been converting a program to run under VMS C C2.0-003.  If I use
the old library from VMS C V1.xxx (crtlib.olb), everything works fine.
When I use the new library (vaxcrtl.olb, creation date 27-APR-1985),
sscanf() seems to fail at random intervals; that is, sscanf() claims
there are no matches (returns -1) even though the input string is
"1 molecules\n" and the format string is "%d molecules".  Has anyone
else seen anything similar?

Things get *real* interesting when I compile and link my program with
the debug option.  If I "go" without setting any watch/break points,
it fails.  If I set a watch point, it sometimes does not fail.  If I
set a break point and look at values, it *never* fails.  I either need
a VMS C guru or a psychiatrist.

*Any* help would be greatly appreciated.  Thanks,

					Conrad Huang