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Groups > comp.lang.c++ > #85614
| From | Juha Nieminen <nospam@thanks.invalid> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Differences between C and C++ |
| Date | 2022-07-25 13:14 +0000 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <tbm4vp$obp$1@gioia.aioe.org> (permalink) |
Some people often object if someone conflates C and C++, as if C++ were
just a pure superset of C, pointing out that they are, in fact, different
languages and, in some aspects, actually incompatible with each other.
That got me thinking: What are all the differences between the two
languages, in behavior and meaning, when it comes to their common syntax?
In other words, I'm not here talking about different keywords and different
syntax that compiles in one but not the other. I'm talking about code that
does compile as both C and C++, but will be interpreted or behave
differently depending on which (and this makes them incompatible).
Here are some of the things that come to mind. What other things are there?
1) A 'const' variable at the global scope will have external linkage by
default in C (unless explicitly made to have internal linkage with
'static'), but internal linkage by default in C++ (unless explicitly made
to have external linkage with 'extern').
2) The type of 'A' is int in C, but char in C++.
3) This one is really obscure: In C, this:
int f(int (*)(), double (*)[3]);
int f(int (*)(char *), double (*)[]);
is a valid function declaration, and equivalent to:
int f(int (*)(char *), double (*)[3]);
(This one is so obscure that I'm certain the vast majority of C programmers,
even experienced ones, would be surprised it even compiles. However, the
example is directly from the C standard, so it's pretty legit.)
In C++ the two first lines declare two different functions, taking different
types of parameter. Calling one is not the same thing as calling the other.
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Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-25 13:14 +0000
Re: Differences between C and C++ "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-07-25 16:18 +0200
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-25 18:47 +0300
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-25 19:49 +0300
Re: Differences between C and C++ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-07-25 19:38 +0100
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-25 08:51 -0700
Re: Differences between C and C++ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-07-25 17:14 +0100
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-25 16:19 +0000
Re: Differences between C and C++ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-07-25 19:28 +0100
Re: Differences between C and C++ Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-07-25 12:21 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-26 07:54 +0000
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-26 08:00 +0000
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-26 08:09 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-26 02:42 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-26 15:29 +0000
Re: Differences between C and C++ scott@slp53.sl.home (Scott Lurndal) - 2022-07-26 16:30 +0000
Re: Differences between C and C++ Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-07-26 11:59 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-27 07:52 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-27 01:56 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-27 14:51 +0000
Re: Differences between C and C++ Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-07-27 11:11 -0700
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-26 06:09 +0000
Re: Differences between C and C++ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-07-27 17:33 +0100
Re: Differences between C and C++ Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2022-07-25 17:45 +0100
Re: Differences between C and C++ Paul N <gw7rib@aol.com> - 2022-07-27 10:09 -0700
Re: Differences between C and C++ Bo Persson <bo@bo-persson.se> - 2022-07-27 19:28 +0200
Re: Differences between C and C++ Paul N <gw7rib@aol.com> - 2022-07-27 11:43 -0700
Re: Differences between C and C++ David Brown <david.brown@hesbynett.no> - 2022-07-29 18:04 +0200
Re: Differences between C and C++ Richard Damon <Richard@Damon-Family.org> - 2022-07-29 18:47 -0400
Re: Differences between C and C++ David Brown <david.brown@hesbynett.no> - 2022-07-30 14:08 +0200
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-28 08:03 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-28 01:57 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-28 09:04 +0000
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-28 06:53 +0000
Re: Differences between C and C++ Richard Damon <Richard@Damon-Family.org> - 2022-07-28 07:33 -0400
Re: Differences between C and C++ Bo Persson <bo@bo-persson.se> - 2022-07-28 15:04 +0200
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-28 15:11 +0000
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-28 20:03 +0300
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-29 07:56 +0000
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-29 12:03 +0300
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-29 09:28 +0000
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-29 12:27 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-29 05:43 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-29 14:14 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-29 08:25 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-29 15:48 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-29 13:12 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-30 09:28 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-30 03:39 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-30 14:23 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-30 19:07 -0700
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-31 07:22 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-31 06:07 -0700
Re: Differences between C and C++ muttley@dastardlyhq.com - 2022-07-31 16:36 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-08-01 01:12 -0700
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-29 22:47 +0000
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-30 03:48 -0700
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-07-29 05:16 -0700
Re: Differences between C and C++ Manfred <noname@add.invalid> - 2022-07-30 02:14 +0200
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-07-31 14:39 +0000
Re: Differences between C and C++ "Fred. Zwarts" <F.Zwarts@KVI.nl> - 2022-07-31 18:49 +0200
Re: Differences between C and C++ Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-07-31 14:49 -0700
Re: Differences between C and C++ Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-07-31 17:03 -0700
Re: Differences between C and C++ Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-08-01 00:16 -0700
Re: Differences between C and C++ Ike Naar <ike@sdf.org> - 2022-08-01 07:27 +0000
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-08-01 10:47 +0300
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-08-01 10:34 +0300
Re: Differences between C and C++ Manfred <noname@add.invalid> - 2022-08-03 01:20 +0200
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-08-03 07:59 +0000
Re: Differences between C and C++ Bo Persson <bo@bo-persson.se> - 2022-08-03 12:45 +0200
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-08-03 10:53 +0000
Re: Differences between C and C++ Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-08-03 03:58 -0700
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-08-03 14:49 +0300
Re: Differences between C and C++ Öö Tiib <ootiib@hot.ee> - 2022-08-03 23:31 -0700
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-08-01 11:29 +0000
Re: Differences between C and C++ Bo Persson <bo@bo-persson.se> - 2022-08-01 14:39 +0200
Re: Differences between C and C++ Juha Nieminen <nospam@thanks.invalid> - 2022-08-02 05:43 +0000
Re: Differences between C and C++ Manfred <noname@add.invalid> - 2022-08-03 01:13 +0200
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-08-03 09:34 +0300
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-29 09:22 +0000
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-29 13:53 +0300
Re: Differences between C and C++ Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-29 14:13 +0300
Re: Differences between C and C++ Muttley@dastardlyhq.com - 2022-07-29 14:11 +0000
Re: Differences between C and C++ Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-07-28 06:16 -0700
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