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
       The creal() function returns 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
   Multithreading (see pthreads(7))
       The creal(), crealf(), and creall() functions are thread-safe.

CONFORMING TO
       C99.

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 3.74 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 http://www.kernel.org/doc/man-pages/.



                                            2013-09-18                                   CREAL(3)