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.
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/.
