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

The Linux Programming Interface

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

       The creal() function returns 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.

CONFORMING TO         top

       C99.

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 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

                                      2008-08-11                             CREAL(3)

HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface