Date: Tue, 5 Dec 2000 07:30:03 -0800 (PST) From: "Jason M. Taylor" <jtaylor@precisioncs.net> To: freebsd-doc@freebsd.org Subject: Re: docs/20117: *printf manpage doesn't document %n Message-ID: <200012051530.eB5FU3285657@freefall.freebsd.org>
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The following reply was made to PR docs/20117; it has been noted by GNATS.
From: "Jason M. Taylor" <jtaylor@precisioncs.net>
To: <freebsd-gnats-submit@FreeBSD.org>, <xaa@dohd.org>
Cc:
Subject: Re: docs/20117: *printf manpage doesn't document %n
Date: Tue, 5 Dec 2000 10:25:58 -0500
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After some looking, I found this documentation from the GNU libc
manual. Would this be acceptable?
The `%n' conversion is unlike any of the other output conversions.
It uses an argument which must be a pointer to an `int', but
instead of
printing anything it stores the number of characters printed so
far by
this call at that location. The `h' and `l' type modifiers are
permitted to specify that the argument is of type `short int *'
or
`long int *' instead of `int *', but no flags, field width, or
precision are permitted.
For example,
int nchar;
printf ("%d %s%n\n", 3, "bears", &nchar);
prints:
3 bears
and sets `nchar' to `7', because `3 bears' is seven characters
- -Jason
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