Re: (printf) ("hello world\n");

[Eyal Lebedinsky <eyal at eyal dot emu dot id dot au>]

Geoff Keating wrote:
> 
> mec.gnu@mindspring.com (Michael Elizabeth Chastain) writes:
> 
> > I have a language lawyer question.
> >
> >   int main ()
> >   {
> >     (printf) ("hello world\n");
> >     return 0;
> >   }
> >
> > Is this a conforming C program?
> >
> > There is no "#include <stdio.h>" so there is no declaration
> > in scope for printf.
> 
> This would be nonconforming even if it was
> 
> int main()
> {
>   printf ("hello world\n");
> }
> 
> since printf is a varargs function and so must be prototyped before it
> is called (ISO C 6.5.2.2 paragraph 6).

But without <stdio.h> the varargs attribute is not present and all is
well. Naturally, it may very well fail to execute correctly, but this
is not the issue here.

--
Eyal Lebedinsky (eyal@eyal.emu.id.au) <http://samba.org/eyal/>