411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a03i
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__NOTOC__
Install and compile this file in your working directory.
/* ------------------------------------ */
/* Save as : c00b.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double **A = r_mR(i_mR(r,r),9);
double **B = r_mR(i_mR(r,r),9);
double **AB = i_mR(r,r);
double **BA = i_mR(r,r);
clrscrn();
printf(" A : ");
p_mR(A, S5,P0,C6);
printf(" B : ");
p_mR(B, S5,P0,C6);
printf(" Trace(AB) = %+.0f \n",
trace_R(mul_mR(A,B,AB)));
printf(" Trace(BA) = %+.0f \n\n",
trace_R(mul_mR(B,A,BA)));
f_mR(A);
f_mR(B);
f_mR(AB);
f_mR(BA);
}
/* ------------------------------------ */
int main(void)
{
time_t t;
srand(time(&t));
do{
fun(rp_I(RC4)+RC2);
} while(stop_w());
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
trace_R(A*B) = trace_R(B*A):
Screen output example:
A :
-7 +2 -5
+9 +9 -4
-9 +1 +1
B :
-2 +4 -4
-8 -4 +8
-6 -9 +1
Trace(AB) = +109
Trace(BA) = +109
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