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Atari Mega Archive 1
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src6.zoo
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csubt.c
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C/C++ Source or Header
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1991-09-24
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/************************************************************************
* *
* N O T I C E *
* *
* Copyright Abandoned, 1987, Fred Fish *
* *
* This previously copyrighted work has been placed into the *
* public domain by the author (Fred Fish) and may be freely used *
* for any purpose, private or commercial. I would appreciate *
* it, as a courtesy, if this notice is left in all copies and *
* derivative works. Thank you, and enjoy... *
* *
* The author makes no warranty of any kind with respect to this *
* product and explicitly disclaims any implied warranties of *
* merchantability or fitness for any particular purpose. *
* *
************************************************************************
*/
/*
* FUNCTION
*
* csubt double precision complex subtraction
*
* KEY WORDS
*
* csubt
* machine independent routines
* complex functions
* math libraries
*
* DESCRIPTION
*
* Computes double precision complex result of subtraction of
* second double precision complex argument from first double
* precision complex argument.
*
* Note that the complex subtraction function is so simple that
* it would not normally be called as a function but simply
* done "inline". It is supplied mostly for completeness.
*
* USAGE
*
* COMPLEX csubt (z1, z2)
* COMPLEX z1;
* COMPLEX z2;
*
* PROGRAMMER
*
* Fred Fish
* Tempe, Az
* (602) 966-8871
*
* INTERNALS
*
* Computes csubt (z1, z2) from:
*
* 1. Let z1 = a + j b
* Let z2 = c + j d
*
* 2. Then csubt(z1,z2) = (a - c) + j (b - d)
*
*/
#include <stdio.h>
#include <pmluser.h>
#include "pml.h"
COMPLEX csubt (z1, z2)
COMPLEX z1;
COMPLEX z2;
{
z1.real -= z2.real;
z1.imag -= z2.imag;
return (z1);
}