man3/cimag.3

   1 '\" t
   2 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   3 .\"
   4 .\" SPDX-License-Identifier: GPL-1.0-or-later
   5 .\"
   6 .TH cimag 3 (date) "Linux man-pages (unreleased)"
   7 .SH NAME
   8 cimag, cimagf, cimagl \- get imaginary part of a complex number
   9 .SH LIBRARY
  10 Math library
  11 .RI ( libm ", " \-lm )
  12 .SH SYNOPSIS
  13 .nf
  14 .B #include <complex.h>
  15 .PP
  16 .BI "double cimag(double complex " z );
  17 .BI "float cimagf(float complex " z );
  18 .BI "long double cimagl(long double complex " z );
  19 .fi
  20 .SH DESCRIPTION
  21 These functions return the imaginary part of the complex number
  22 .IR z .
  23 .PP
  24 One has:
  25 .PP
  26 .in +4n
  27 .EX
  28 z = creal(z) + I * cimag(z)
  29 .EE
  30 .in
  31 .SH ATTRIBUTES
  32 For an explanation of the terms used in this section, see
  33 .BR attributes (7).
  34 .TS
  35 allbox;
  36 lbx lb lb
  37 l l l.
  38 Interface       Attribute       Value
  39 T{
  40 .na
  41 .nh
  42 .BR cimag (),
  43 .BR cimagf (),
  44 .BR cimagl ()
  45 T}      Thread safety   MT-Safe
  46 .TE
  47 .sp 1
  48 .SH VERSIONS
  49 GCC also supports __imag__.
  50 That is a GNU extension.
  51 .SH STANDARDS
  52 C11, POSIX.1-2008.
  53 .SH HISTORY
  54 glibc 2.1.
  55 C99, POSIX.1-2001.
  56 .SH SEE ALSO
  57 .BR cabs (3),
  58 .BR creal (3),
  59 .BR complex (7)