Name
modf, modff, modfl — extract signed integral and
fractional values from floating-point number
Synopsis
#include <math.h>
double modf( |
double |
x, |
|
double * |
iptr) ; |
float
modff( |
float |
x, |
|
float * |
iptr) ; |
long
double modfl( |
long double |
x, |
|
long double * |
iptr) ; |
![[Note]](../stylesheet/note.png) |
Note |
Link with −lm.
|
DESCRIPTION
The modf
() function breaks
the argument x
into
an integral part and a fractional part, each of which has the
same sign as x
. The
integral part is stored in iptr
.
RETURN VALUE
The modf
() function returns
the fractional part of x
.
CONFORMING TO
SVr4, 4.3BSD, C89. The float
and long double variants are C99
requirements.
SEE ALSO
frexp(3), ldexp(3)
Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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manual provided the copyright notice and this permission notice are
preserved on all copies.
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.
Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date. The author(s) assume no
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the use of the information contained herein. The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
professionally.
Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.
References consulted:
Linux libc source code
Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
386BSD man pages
Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
Modified 2002-07-27 by Walter Harms
(walter.harms@informatik.uni-oldenburg.de)
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