Re: default function parameters

[Steve Graegert <graegerts@gmail.com>]

On 9/9/05, _z33 <timid.Gentoo@gmail.com> wrote:
> Steve Graegert wrote:
> > I have modified the code to clarify my thoughts:
> >
> >       #include <stdio.h>
> >
> >       /* prototype */
> >       void add(); /* call with arbitrary number of arguments */
> >
> >       void add (int a, int b, int c) {
> >               printf ("inside function: add(%d, %d)\n", a, b);
> >               return;
> >       }
> >
> >       int main (void) {
> >               /* call function add with some parameters */
> >               add(5, 1);
> >               getc(stdin);
> >
> >               return (0);
> >       }
> >
> > Do you see the difference?  No warning is issued, because there is
> > nothing wrong with it (it is not recommended by ANSI C99 but still
> > valid).
> >
> 
>   Inside "main", did you mean to write the function call as " add (5,
> 1, <some number>); ". Cos' when I copy the code, and try to run it, it
> throws me this error message during compilation.
>   - too few arguments to function `add'-

No, the code given is exactly what I wanted to show. (The code you
provided was Windows code and I tested it under Windows without
complaints.)

Unfortunately, under Linux you cannot switch to "traditional" since it
would clash with libc which is an ISO C library.  Under Solaris
(SPARCWorx) you may want to try -traditional and -fd.  As far as I
know only SunOS and HP-UX (besides Windows) come with a native K&R C
compiler.  All others do prototype checking.

> >>  Am I fundamentally going wrong in my understanding of functions?
> >
> >
> > No you're not.  You're just curious :-)
> 
> Thanks!
>