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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: What is the difference between (r+ and w+)
Date: Sun, 18 Jun 2017 15:14:41 -0700
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Lew Pitcher <lew.pitcher@digitalfreehold.ca> writes:
> Lew Pitcher wrote:
[...]
>> Thanks, but I don't need luck; I know how to program. And, yes, I can "run
>> printf()" without including stdio.h in my code...
>> 
>>   17:10 $ cat nostdio.c
>>   int printf(char *, ...);
[snip]
> And, before the more knowledgable C programmers of the group point out my 
> mistake in the prototype for printf(), you can have...
>
>   17:14 $ cat nostdio.c
>   int printf(const char *, ...);

I'd use:

    int printf(const char * restrict format, ...);

unless I had to worry about pre-C99 compilers.  It's likely I could
get away with omitting "const" and/or "restrict", but it's easier
to copy the standard declaration than to think about what changes
I can get away with.  (All this assumes I have some reason not to
use #include <stdio.h>.)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"