NAME | SYNOPSIS | DESCRIPTION | VERSIONS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON 

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

NAME         top

       creal, crealf, creall - get real part of a complex number

SYNOPSIS         top

       #include <complex.h>
       double creal(double complex z);
       float crealf(float complex z);
       long double creall(long double complex z);
       Link with -lm.

DESCRIPTION         top

       These functions return the real part of the complex number z.
       One has:
           z = creal(z) + I * cimag(z)

VERSIONS         top

       These functions first appeared in glibc in version 2.1.

ATTRIBUTES         top

       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         top

       C99, POSIX.1-2001, POSIX.1-2008.

NOTES         top

       The gcc supports also __real__.  That is a GNU extension.

SEE ALSO         top

       cabs(3), cimag(3), complex(7)

COLOPHON         top

       This page is part of release 4.12 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)

Pages that refer to this page: cimag(3),  complex(7)