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Groups > comp.lang.c > #106889
| From | Richard Heathfield <rjh@cpax.org.uk> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Can a variable be both static and extern |
| Date | 2017-03-24 11:40 +0000 |
| Organization | Fix this later |
| Message-ID | <ob30dn$6b6$1@dont-email.me> (permalink) |
| References | <6e7c0a5e-70aa-4163-b29a-3625ffc541d0@googlegroups.com> |
On 24/03/17 11:23, acidlategamer@gmail.com wrote:
> I was asked this in a interview
>
> #include <stdio.h>
>
> static int a;
> extern int a;//
>
> int main()
> {
> a = 10;
> printf("%d\n", a);
> return 0;
> }
That isn't a question, unless the implied question is "what does this
code mean?" in which case the correct answer is "it means that whoever
wrote it needs to be transferred to Marketing".
The output of the code will be 10 and a newline character.
> I said I will refrain from writing such things in a code, whatever
> the use case (because I really had no idea).
You gave the right answer, but for the wrong reason. It's the right
answer because it's senseless to give 'a' file scope. It's also
senseless to call it 'a'.
> Later I told that it should be a compilation error as static makes a
> to live only while this file runs, extern makes it seem that a can live
> outside of this scope, that is contradictory. This program compiled.
I see no reason why it shouldn't compile.
> 1. Where I am wrong?
I don't think you /are/ wrong in this case.
> 2. What would be your answer?
Bring me the head of your project team leader!
> 3. Is there any use case exists?
No. It's stupid code. There certainly are cases where file scope
identifiers are better than the alternatives, but this isn't one of
those cases.
--
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within
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Can a variable be both static and extern acidlategamer@gmail.com - 2017-03-24 04:23 -0700
Re: Can a variable be both static and extern Richard Heathfield <rjh@cpax.org.uk> - 2017-03-24 11:40 +0000
Re: Can a variable be both static and extern acidlategamer@gmail.com - 2017-03-24 04:54 -0700
Re: Can a variable be both static and extern Richard Heathfield <rjh@cpax.org.uk> - 2017-03-24 12:09 +0000
Re: Can a variable be both static and extern James Kuyper <jameskuyper@verizon.net> - 2017-03-24 11:45 -0400
Re: Can a variable be both static and extern raltbos@xs4all.nl (Richard Bos) - 2017-03-25 22:27 +0000
Re: Can a variable be both static and extern Keith Thompson <kst-u@mib.org> - 2017-03-24 11:35 -0700
Re: Can a variable be both static and extern Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-24 12:11 +0000
Re: Can a variable be both static and extern raltbos@xs4all.nl (Richard Bos) - 2017-03-24 12:14 +0000
Re: Can a variable be both static and extern David Brown <david.brown@hesbynett.no> - 2017-03-24 17:11 +0100
Re: Can a variable be both static and extern scott@slp53.sl.home (Scott Lurndal) - 2017-03-24 16:22 +0000
Re: Can a variable be both static and extern David Brown <david.brown@hesbynett.no> - 2017-03-24 17:38 +0100
Re: Can a variable be both static and extern James Kuyper <jameskuyper@verizon.net> - 2017-03-24 12:23 -0400
Re: Can a variable be both static and extern David Brown <david.brown@hesbynett.no> - 2017-03-24 17:41 +0100
Re: Can a variable be both static and extern jameskuyper@verizon.net - 2017-03-24 09:57 -0700
Re: Can a variable be both static and extern supercat@casperkitty.com - 2017-03-24 10:38 -0700
Re: Can a variable be both static and extern Richard Heathfield <rjh@cpax.org.uk> - 2017-03-24 18:24 +0000
Re: Can a variable be both static and extern "James R. Kuyper" <jameskuyper@verizon.net> - 2017-03-25 10:47 -0400
Re: Can a variable be both static and extern Richard Heathfield <rjh@cpax.org.uk> - 2017-03-25 16:48 +0000
Re: Can a variable be both static and extern Keith Thompson <kst-u@mib.org> - 2017-03-25 10:31 -0700
Re: Can a variable be both static and extern Richard Heathfield <rjh@cpax.org.uk> - 2017-03-25 18:23 +0000
Re: Can a variable be both static and extern supercat@casperkitty.com - 2017-03-25 12:28 -0700
Re: Can a variable be both static and extern Ike Naar <ike@iceland.freeshell.org> - 2017-03-25 19:50 +0000
Re: Can a variable be both static and extern supercat@casperkitty.com - 2017-03-25 13:20 -0700
Re: Can a variable be both static and extern jameskuyper@verizon.net - 2017-03-25 10:44 -0700
Re: Can a variable be both static and extern supercat@casperkitty.com - 2017-03-25 12:13 -0700
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