redhat man page for cimag

CIMAG(3)                                                     Linux Programmer's Manual                                                    CIMAG(3)

NAME
       cimag, cimagf, cimagl - get imaginary part of a complex number

SYNOPSIS
       #include <complex.h>

       double cimag(double complex z);
       float cimagf(float complex z);
       long double cimagl(long double complex z);

       Link with -lm.

DESCRIPTION
       These functions return the imaginary part of the complex number z.

       One has:

           z = creal(z) + I * cimag(z)

VERSIONS
       These functions first appeared in glibc in version 2.1.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +----------------------------+---------------+---------+
       |Interface                   | Attribute     | Value   |
       +----------------------------+---------------+---------+
       |cimag(), cimagf(), cimagl() | Thread safety | MT-Safe |
       +----------------------------+---------------+---------+
CONFORMING TO
       C99, POSIX.1-2001, POSIX.1-2008.

NOTES
       gcc also supports __imag__.  That is a GNU extension.

SEE ALSO
       cabs(3), creal(3), complex(7)

COLOPHON
       This  page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

                                                                    2015-04-19                                                            CIMAG(3)