CREAL
Section: Linux Programmer's Manual (3)
Updated: 2015-04-19
Page Index
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
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