creal, crealf, creall - get real part of a complex number
#include <complex.h>
double creal(double complex z);
float crealf(float complex z);
long double creall(long double complex z);
Link with
-lm.
These functions return the real part of the complex number
z.
One has:
z = creal(z) + I * cimag(z)
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| creal (), crealf (), creall () |
Thread safety |
MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
The gcc supports also __real__. That is a GNU extension.
cabs(3),
cimag(3),
complex(7)