| .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| .\" |
| .\" Permission is granted to make and distribute verbatim copies of this |
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| .\" 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| .\" manual page may be incorrect or out-of-date.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 |
| .\" responsibility for errors or omissions, or for damages resulting from |
| .\" the use of the information contained herein. The author(s) may not |
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| .\" which is licensed free of charge, as they might when working |
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| .\" 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) |
| .\" |
| .TH MODF 3 2002-07-27 "" "Linux Programmer's Manual" |
| .SH NAME |
| modf, modff, modfl \- extract signed integral and fractional values from floating-point |
| number |
| .SH SYNOPSIS |
| .nf |
| .B #include <math.h> |
| .sp |
| .BI "double modf(double " x ", double *" iptr ); |
| .br |
| .BI "float modff(float " x ", float *" iptr ); |
| .br |
| .BI "long double modfl(long double " x ", long double *" iptr ); |
| .fi |
| .sp |
| Link with \-lm. |
| .SH DESCRIPTION |
| The \fBmodf\fP() function breaks the argument \fIx\fP into an integral |
| part and a fractional part, each of which has the same sign as \fIx\fP. |
| The integral part is stored in \fIiptr\fP. |
| .SH "RETURN VALUE" |
| The \fBmodf\fP() function returns the fractional part of \fIx\fP. |
| .SH "CONFORMING TO" |
| SVID 3, POSIX, 4.3BSD, ISO 9899. |
| The float and the long double variants are C99 requirements. |
| .SH "SEE ALSO" |
| .BR frexp (3), |
| .BR ldexp (3) |