man3/fmax.3

   1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   2 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
   3 .\"     <mtk.manpages@gmail.com>
   4 .\"
   5 .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
   6 .\" Distributed under GPL
   7 .\" %%%LICENSE_END
   8 .\"
   9 .TH FMAX 3 2017-09-15 "" "Linux Programmer's Manual"
  10 .SH NAME
  11 fmax, fmaxf, fmaxl \- determine maximum of two floating-point numbers
  12 .SH SYNOPSIS
  13 .B #include <math.h>
  14 .PP
  15 .BI "double fmax(double " x ", double " y );
  16 .BI "float fmaxf(float " x ", float " y );
  17 .BI "long double fmaxl(long double " x ", long double " y );
  18 .PP
  19 Link with \fI\-lm\fP.
  20 .PP
  21 .in -4n
  22 Feature Test Macro Requirements for glibc (see
  23 .BR feature_test_macros (7)):
  24 .in
  25 .PP
  26 .ad l
  27 .BR fmax (),
  28 .BR fmaxf (),
  29 .BR fmaxl ():
  30 .RS 4
  31 _ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L
  32 .RE
  33 .ad
  34 .SH DESCRIPTION
  35 These functions return the larger value of
  36 .I x
  37 and
  38 .IR y .
  39 .SH RETURN VALUE
  40 These functions return the maximum of
  41 .I x
  42 and
  43 .IR y .
  44 .PP
  45 If one argument is a NaN, the other argument is returned.
  46 .PP
  47 If both arguments are NaN, a NaN is returned.
  48 .SH ERRORS
  49 No errors occur.
  50 .SH VERSIONS
  51 These functions first appeared in glibc in version 2.1.
  52 .SH ATTRIBUTES
  53 For an explanation of the terms used in this section, see
  54 .BR attributes (7).
  55 .TS
  56 allbox;
  57 lbw24 lb lb
  58 l l l.
  59 Interface       Attribute       Value
  60 T{
  61 .BR fmax (),
  62 .BR fmaxf (),
  63 .BR fmaxl ()
  64 T}      Thread safety   MT-Safe
  65 .TE
  66 .SH CONFORMING TO
  67 C99, POSIX.1-2001, POSIX.1-2008.
  68 .SH SEE ALSO
  69 .BR fdim (3),
  70 .BR fmin (3)