From: chuck@amdahl.amdahl.com (Charles Simmons)
Subject: Re: "C" vrs ADA
Date: Wed, 26-Aug-87 15:32:08 EDT [thread overview]
Date: Wed Aug 26 15:32:08 1987
Message-ID: <12962@amdahl.amdahl.com> (raw)
In-Reply-To: 6338@brl-smoke.ARPA
In article <6338@brl-smoke.ARPA> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes:
>The language the code is written in is really a very small part of
>structured software methodology; one can apply the techniques in
>COBOL, PL/I, FORTRAN, Pascal, or C. As a matter of fact, there are
>C environments for sale that are just about as "safe" as Ada; most
>typo and similar errors are caught by C compilation and "lint";
>unhandled exceptions in C typically produce an immediate core image
>for debugging, etc. Very little difference, really.
Um... How do these C environments detect subscript range errors
in a piece of code like:
strcpy(s,t)
char *s, *t;
{ while (*s++ = *t++); return s;}
Although an unhandled exception in C "typically" produces a dump,
it does not "always" produce a dump. Also, the dump may occur long
after the invalid code was executed, making it more difficult to figure
out what went wrong.
Yes, lint does work quite well. Unfortunately, I come from a PL1
background where the compiler generated type-checking information
and the linker made sure everything matched. With lint, I have to
have to perform an extra pass through my code. Admittedly, it's not
a whole lot of work, but if type-checking were integrated with the
compiler, things would move along a little faster...
>C's one really major problem from the structured viewpoint is
>that it has only two effective levels of name space, module
>internal and global. This makes it necessary to strictly
>allocate global names, which is an annoying but solvable problem.
Tee hee... And here I was beginning to think the name space rules
were one of the advantages of C. Actually, arn't there three levels
of name space? "static global" or a variable that can only be seen
from within a file, "procedure internal" or a variable that can only
be seen from within the surrounding procedure (or "begin end" block),
and "external global" or a variable that exists everywhere.
-- Chuck
next prev parent reply other threads:[~1987-08-26 19:32 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
1987-08-17 21:36 "C" vrs ADA Glen Harman
1987-08-18 14:49 ` spf
1987-08-19 17:03 ` "C" AND Ada Eugene Miya N.
1987-08-20 1:52 ` Richard Harter
1987-08-20 17:29 ` "C" AND Ada (epigram) David Palmer
1987-08-21 9:09 ` "C" AND Ada Kent Paul Dolan
1987-08-19 20:45 ` "C" vrs ADA ark
1987-08-20 20:10 ` Stephen 2. Williams
1987-08-21 0:19 ` Jef Poskanzer
1987-08-21 9:15 ` Webber
1987-08-21 1:04 ` R.A. Agnew
1987-08-21 15:27 ` spf
1987-08-23 0:35 ` Henry Spencer
1987-08-23 18:07 ` wyatt
1987-08-25 17:55 ` John Unekis
1987-08-25 18:57 ` David C. Albrecht
1987-08-27 16:32 ` Henry Spencer
1987-08-28 16:31 ` Renu Raman, Sun Microsystems
1987-08-28 15:51 ` Peter da Silva
1987-08-30 1:05 ` Rahul Dhesi
1987-08-31 13:55 ` sns
1987-09-04 16:51 ` VAX/VMS C Jim Sullivan
1987-08-18 15:17 ` "C" vrs ADA G.Gleason
1987-08-18 18:09 ` John Unekis
1987-08-21 12:07 ` Mr. Patrick J. Kelly Jr. GS-13
1987-08-21 13:00 ` steve
1987-08-21 14:04 ` Stefan M. Vorkoetter
1987-08-22 23:31 ` COBOL vs "C" vs ADA neubauer
1987-08-24 23:11 ` Dave Levenson
1987-08-25 19:18 ` FORTRAN vs COBOL vs Pascal vs C " Stephen the Greatest
1987-08-23 13:13 ` COBOL vrs Ada (was: Re: "C" vrs ADA) Kent Paul Dolan
1987-08-21 14:17 ` "C" vrs ADA M.P.Lindner
1987-08-21 15:10 ` Dave Haynie
1987-08-21 16:07 ` crowl
1987-08-22 2:44 ` hitchens
1987-08-27 18:53 ` jym
1987-08-22 14:31 ` Roy Smith
1987-08-26 16:17 ` Kurt Hoyt
1987-08-23 0:33 ` Henry Spencer
1987-08-18 18:43 ` Dave Haynie
1987-08-22 21:09 ` Eric Beser sys admin
1987-08-25 16:35 ` David Palmer
1987-08-26 14:21 ` spf
1987-08-28 0:49 ` peter
1987-09-03 20:03 ` R.A. Agnew
1987-08-26 3:38 ` Doug Gwyn
1987-08-26 19:32 ` Charles Simmons [this message]
1987-08-26 9:25 ` Randell Jesup
1987-08-26 15:40 ` M.P.Lindner
1987-08-27 17:44 ` Jeff Bartlett
1987-08-31 17:53 ` mpl
1987-09-01 22:03 ` Barry Margolin
1987-09-02 0:32 ` eric
1987-08-26 18:30 ` Dave Haynie
1987-08-29 6:25 ` Henry Spencer
1987-09-01 19:02 ` Jacob Gore
1987-09-02 14:09 ` stt
-- strict thread matches above, loose matches on Subject: below --
1987-08-25 20:44 blackje%sungod.tcpip
[not found] <822@s.cc.purdue.edu>
1987-08-28 12:33 ` kelly
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