Интерактивная система просмотра системных руководств (man-ов) crealf (3) crealf ( FreeBSD man: Библиотечные вызовы ) crealf ( Русские man: Библиотечные вызовы ) >> crealf ( Linux man: Библиотечные вызовы ) crealf ( POSIX man: Библиотечные вызовы )
NAME
creal, crealf, creall - get real part of a complex number
SYNOPSIS
#include <complex.h >
double creal(double complex z );
float crealf(float complex z );
long double creall(long double complex z );
Link with -lm .
DESCRIPTION
The
creal ()
function returns the real part of the complex number
z .
One has:
z = creal(z) + I * cimag(z)
VERSIONS
These functions first appeared in glibc in version 2.1.
CONFORMING TO
C99.
NOTES
The gcc supports also __real__.
That is a GNU extension.
SEE ALSO
cabs cimag complex
COLOPHON
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
NAME
SYNOPSIS
DESCRIPTION
VERSIONS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON
