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cmmul.c
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/* cmmul.c CCMATH mathematics library source code.
*
* Copyright (C) 2000 Daniel A. Atkinson All rights reserved.
* This code may be redistributed under the terms of the GNU library
* public license (LGPL). ( See the lgpl.license file for details.)
* ------------------------------------------------------------------------
*/
#include "ccmath.h"
void cmmul(Cpx *c, Cpx *a, Cpx *b, int n)
{
Cpx s, *p, *q;
int i, j, k;
trncm(b, n);
for (i = 0; i < n; ++i, a += n) {
for (j = 0, q = b; j < n; ++j) {
for (k = 0, p = a, s.re = s.im = 0.; k < n; ++k) {
s.re += p->re * q->re - p->im * q->im;
s.im += p->im * q->re + p->re * q->im;
++p;
++q;
}
*c++ = s;
}
}
trncm(b, n);
}
ccmath.h
trncm
void trncm(Cpx *a, int n)
Definition trncm.c:11
Cpx
struct complex Cpx
Definition ccmath.h:41
cmmul
void cmmul(Cpx *c, Cpx *a, Cpx *b, int n)
Definition cmmul.c:11
b
double b
Definition driver/set_window.c:5
complex::re
double re
Definition ccmath.h:39
complex::im
double im
Definition ccmath.h:39