Date: Fri, 26 Feb 1999 20:57:44 +0000 From: Andy Doran <ad@psn.ie> To: "Alton, Matthew" <Matthew.Alton@anheuser-busch.com> Cc: "'Hackers@FreeBSD.ORG'" <Hackers@FreeBSD.ORG>, "Ladendorf, Matt" <Matt.Ladendorf@anheuser-busch.com> Subject: Re: printf wierdness Message-ID: <36D70AC8.A862B8C0@psn.ie> References: <BED2E68B5FB4D21193C90008C7C56836564C53@STLABCEXG012>
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printf() is treating the %llu type as an unsigned long (%lu),
so it's taking the value for %s from the second 32-bits in
'foo'. Check the printf(3) manpage.
Andy.
"Alton, Matthew" wrote:
>
> Why is this happening?
>
> $ vi foo.c
>
> #include <stdio.h>
>
> int
> main(void)
> {
> unsigned long long int foo = 0;
> char *bar = "Hidely Ho!";
>
> (void)printf("%llu %s\n", foo, bar);
> (void)printf("%s %llu\n", bar, foo);
>
> return 0;
> }
>
> ~
> ~
> ~
> ~
> ~
> ~
> ~
> ~
> ~
> foo.c: 14 lines, 196 characters.
> $ make foo
> cc foo.c -o foo
> $ ./foo
> 0 (null)
> Hidely Ho! 0
> $
>
> Matthew Alton
> Computer Services - UNIX Systems Administration
> (314)632-6644 matthew.alton@anheuser-busch.com
> alton@plantnet.com
>
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