411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0gu
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/* ------------------------------------ */
/* Save as : c00b.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double **A = rcentrosymmetric_mR( i_mR(r,r),9.);
double **B = rcentrosymmetric_mR( i_mR(r,r),9.);
double **AB = mul_mR(A,B, i_mR(r,r));
clrscrn();
printf(" A:");
p_mR(A, S5,P0,C7);
printf(" B:");
p_mR(B, S5,P0,C7);
printf(" AB:");
p_mR(AB, S5,P0,C7);
f_mR(A);
}
/* ------------------------------------ */
int main(void)
{
time_t t;
srand(time(&t));
do
{
fun( rp_I(RC2)*RC2 + RC1);
} while(stop_w());
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
The product of the matrix AB is centrosymmetric
Screen output example:
A:
+6 +9 -4
-5 +1 -5
-4 +9 +6
B:
-4 +2 -7
-6 -7 -6
-7 +2 -4
AB:
-50 -59 -80
+49 -27 +49
-80 -59 -50
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