Re: [Dev-C++] Error using void main (void)

[Robert A. <ral...@gm...>]

Actually,

I believe that the ANSI standard allows main to just end without any
return code which isn't allowed for any other function declared to
return an int.  And as a special consideration for main it will return
'0' (zero) for you.

Actually.. a few web searches indicate that is C++ standard not C.  So
it looks like for C you are correct... what ever garbage happens to be
in the return register.

-Robert

On 4/21/05, Ray Kulhanek <kul...@wr...> wrote:
> Another thing to consider is that, as far as I know, while the return
> *type* of a function defaults to int, the return *value* doesn't default
> to anything in particular. If so, it might just return whatever value
> happens to live in memory at a certain point, and if the value is
> anything other than 0, the operating system will interpret that to mean
> that the program terminated with an error.  (It's good form to
> include the type specification and return statement, regardless.)
>=20
> Per Westermark <pw...@ia...> wrote:
> > Note that
> >   main()
> > is ONLY allowed for C programs, where a symbol without a declared data
> > type defaults to int, i.e.
> >   main()
> > in reality means:
> >   int main()
> > in a C program.
> > For C++ programs, you MUST actually use
> >   int main()
> > since the ISO C++ standard requires it. Yes, I know that g++ do accept
> > the
> > lazy form and only emits "warning: ISO C++ forbids declaration of
> > `main=3DB4
> > with no type" if warnings are enabled. However, don't assume something
> > about how other compilers look at ISO compliance requirements!
> > /Per W
> > On Thu, 21 Apr 2005, Austin Scholze wrote:
> >
> >> also, I have found in dev-C++ that you may just use
> >>
> >> main()
> >>
> >> without actually initializing it and that it will exit at the end of
> >> the function.
> >>   ----- Original Message -----
> >>   From: Verne H. Bohlender
> >>   To: Dev C++ ; Alfred P. Reaud
> >>   Sent: Wednesday, April 20, 2005 9:48 PM
> >>   Subject: Re: [Dev-C++] Error using void main (void)
> >>
> >>
> >>   That's what it should say as it really should be
> >>
> >>   int main() or with all the other goodies inside the brackets.  If yo=
u
> >> read across it says"int main void for the two ( )'s for the void here!
> >>
> >>   Verne
> >>       The GRIN Genius who knows nothing!
> >>
> >>     Warnings are mostly ignorable, or nice if you like to write clean
> >> portable code.  main should always return an int as that's the exit
> >> value that the executable gives to DOS/Win/Linux upon completion.
> >> Source should  compile and run with a void main.  However, main's exit
> >> value will then always be 0 and therefore useless to test for a certai=
n
> >> execution completion status.
> >>
> >>     Alexsandro Meireles <mei...@gm...> wrote:
> >>       Hi, all!
> >>
> >>       I tried to use the following expression in Dev-C++
> >>
> >>       void main (void)
> >>
> >>       The compiler give a warning message "output of main is not int".
> >> Something like that. Although it gives this warning it compilies well.
> >> Why this happens? Main should always have a return type?
> >>
> >>       Tks in advance!
> >>
> >>       --
> >>       Alexsandro Meireles
> >>
> >>
> >>
> >>     Alfred P. Reaud
>=20
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