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.
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