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CREAL(3)                   Linux Programmer's Manual                  CREAL(3)
NAME
       creal, crealf, creall - get real part of a complex number
SYNOPSIS
       #include <complex.h>
       double creal(double complex z);
       float crealf(float complex z);
       long double creall(long double complex z);
       Link with -lm.
DESCRIPTION
       These functions return the real 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   |
       +----------------------------+---------------+---------+
       |creal(), crealf(), creall() | Thread safety | MT-Safe |
       +----------------------------+---------------+---------+
CONFORMING TO
       C99, POSIX.1-2001, POSIX.1-2008.
NOTES
       The gcc supports also __real__.  That is a GNU extension.
SEE ALSO
       cabs(3), cimag(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                          CREAL(3)