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NAME | SYNOPSIS | DESCRIPTION | VERSIONS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
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CREAL(3) Linux Programmer's Manual CREAL(3)
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)
This page is part of release 4.15 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
2015-04-19 CREAL(3)
Pages that refer to this page: cimag(3), complex(7)
Copyright and license for this manual page
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