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(Output Conversion Syntax): Document how to use precision with the * precision.

This commit is contained in:
Ulrich Drepper 2002-04-22 19:42:10 +00:00
parent eb655ccbe7
commit f89829da36
1 changed files with 11 additions and 4 deletions
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15
manual/stdio.texi
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@ -1618,9 +1618,16 @@ template string.
The conversion specifications in a @code{printf} template string have The conversion specifications in a @code{printf} template string have
the general form: the general form:
@example @smallexample
% @r{[} @var{param-no} @r{$]} @var{flags} @var{width} @r{[} . @var{precision} @r{]} @var{type} @var{conversion} % @r{[} @var{param-no} @r{$]} @var{flags} @var{width} @r{[} . @var{precision} @r{]} @var{type} @var{conversion}
@end example @end smallexample
@noindent
or
@smallexample
% @r{[} @var{param-no} @r{$]} @var{flags} @var{width} . @r{*} @r{[} @var{param-no} @r{$]} @var{type} @var{conversion}
@end smallexample
For example, in the conversion specifier @samp{%-10.8ld}, the @samp{-} For example, in the conversion specifier @samp{%-10.8ld}, the @samp{-}
is a flag, @samp{10} specifies the field width, the precision is is a flag, @samp{10} specifies the field width, the precision is
@ -1640,13 +1647,13 @@ formats in the order of appearance in the format string. But in some
situations (such as message translation) this is not desirable and this situations (such as message translation) this is not desirable and this
extension allows an explicit parameter to be specified. extension allows an explicit parameter to be specified.
The @var{param-no} part of the format must be an integer in the range of The @var{param-no} parts of the format must be integers in the range of
1 to the maximum number of arguments present to the function call. Some 1 to the maximum number of arguments present to the function call. Some
implementations limit this number to a certainly upper bound. The exact implementations limit this number to a certainly upper bound. The exact
limit can be retrieved by the following constant. limit can be retrieved by the following constant.
@defvr Macro NL_ARGMAX @defvr Macro NL_ARGMAX
The value of @code{ARGMAX} is the maximum value allowed for the The value of @code{NL_ARGMAX} is the maximum value allowed for the
specification of an positional parameter in a @code{printf} call. The specification of an positional parameter in a @code{printf} call. The
actual value in effect at runtime can be retrieved by using actual value in effect at runtime can be retrieved by using
@code{sysconf} using the @code{_SC_NL_ARGMAX} parameter @pxref{Sysconf @code{sysconf} using the @code{_SC_NL_ARGMAX} parameter @pxref{Sysconf