Linear Algebra and the C Language/a0dd
Install and compile this file in your working directory.
/* ------------------------------------ */
/* Save as: c00d.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double s = rp_I(8)+1;
double **A = rsymmetric_mR( i_mR(r, r),99);
double **EValueA = eigs_mR(A, i_mR(r,C1));
double **sA = smul_mR(s,A, i_mR(r, r));
double **EValuesA = eigs_mR(sA, i_mR(r,C1));
int i = 0;
clrscrn();
printf(" A:");
p_mR(A,S3,P0,C6);
printf(" EValue A:");
p_mR(EValueA,S13,P6,C1);
printf(" %.0fA:",s);
p_mR(sA,S4,P0,C6);
printf(" EValue%.0fA:",s);
p_mR(EValuesA,S13,P6,C1);
stop();
clrscrn();
printf(" EValue%.0fA:",s);
p_mR(EValuesA,S13,P6,C1);
printf(" %.2f(EValuesA):\n",s);
for(i=R1;i<=r;i++)
printf(" %+12.6f \n", s*EValueA[i][C1]);
f_mR(A);
f_mR(EValueA);
f_mR(sA);
f_mR(EValuesA);
}
/* ------------------------------------ */
int main(void)
{
time_t t;
srand(time(&t));
do
{
fun(rp_I(R2)+R2);
} while(stop_w());
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Screen output example:
A:
-79 -29 +92 +81
-29 +44 +32 -39
+92 +32 -59 +28
+81 -39 +28 -94
EValue A:
-188.541294
-123.106223
+78.204908
+45.442609
5A:
-395 -145 +460 +405
-145 +220 +160 -195
+460 +160 -295 +140
+405 -195 +140 -470
EValue5A:
-942.706470
-615.531114
+391.024540
+227.213044
Press return to continue.
EValue5A:
-942.706470
-615.531114
+391.024540
+227.213044
5.00(EValuesA):
-942.706470
-615.531114
+391.024540
+227.213044
Press return to continue
Press X return to stop