mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-24 23:32:06 +00:00
54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
/* $NetBSD: cabs.c,v 1.1 2007/08/20 16:01:30 drochner Exp $ */
|
|
|
|
/*
|
|
* Written by Matthias Drochner <drochner@NetBSD.org>.
|
|
* Public domain.
|
|
*
|
|
* imported and modified include for newlib 2010/10/03
|
|
* Marco Atzeri <marco_atzeri@yahoo.it>
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<cabs>>, <<cabsf>>---complex absolute-value
|
|
|
|
INDEX
|
|
cabs
|
|
INDEX
|
|
cabsf
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <complex.h>
|
|
double cabs(double complex <[z]>);
|
|
float cabsf(float complex <[z]>);
|
|
|
|
|
|
DESCRIPTION
|
|
These functions compute compute the complex absolute value
|
|
(also called norm, modulus, or magnitude) of <[z]>.
|
|
|
|
<<cabsf>> is identical to <<cabs>>, except that it performs
|
|
its calculations on <<floats complex>>.
|
|
|
|
RETURNS
|
|
The cabs functions return the complex absolute value.
|
|
|
|
PORTABILITY
|
|
<<cabs>> and <<cabsf>> are ISO C99
|
|
|
|
QUICKREF
|
|
<<cabs>> and <<cabsf>> are ISO C99
|
|
|
|
*/
|
|
|
|
|
|
#include <complex.h>
|
|
#include <math.h>
|
|
|
|
double
|
|
cabs(double complex z)
|
|
{
|
|
|
|
return hypot( creal(z), cimag(z) );
|
|
}
|