CentOS 5.4

GNU/Linux	CentOS 5.4
	creall(3)

CREAL

NAME

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.

The creal() function returns the real part of the complex number z.

One has z = creal(z) + I*cimag(z).

The gcc supports also __real__. That is a GNU extension.

C99