creal
, crealf
,
creall
—
complex real functions
#include <complex.h>
double
creal
(double
complex z);
float
crealf
(float
complex z);
long double
creall
(long
double complex z);
#include
<tgmath.h>
complex-float
creal
(complex-float
z);
These functions compute the real part of z.
These functions return the real part value.
For a variable z of type complex:
z == creal(z) + cimag(z)*I
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html .