Linux manual pages Section 3: Subroutines  

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);
 
[Note] Note

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(3), cimag(3), complex(7)

COLOPHON

This page is part of release 3.52 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/.


  Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)

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