411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0g7
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__NOTOC__
Install and compile this file in your working directory.
/* ------------------------------------ */
/* Save as : c00c.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
int main(void)
{
double a[R3*C3]={ 2,9,9,
1,9,9,
1,9,9 };
double id[R3*C3]={1./2.,0,0,
0,1,0,
0,0,1 };
double **A = ca_A_mR(a, i_mR(R3,C3));
double **ID = ca_A_mR(id, i_mR(R3,C3));
double **AID = mul_mR(A,ID, i_mR(R3,C3));
clrscrn();
printf(" Put the pivot at one: [R1,C1]\n\n");
printf(" ID:");
p_mR(ID, S3,P2,C6);
printf(" A:");
p_mR(A, S3,P2,C6);
printf(" A ID:");
p_mR(AID, S3,P2,C6);
stop();
f_mR(A);
f_mR(ID);
f_mR(AID);
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Put the pivot at one:
Screen output example:
Put the pivot at one: [R1,C1]
ID:
+0.50 +0.00 +0.00
+0.00 +1.00 +0.00
+0.00 +0.00 +1.00
A:
+2.00 +9.00 +9.00
+1.00 +9.00 +9.00
+1.00 +9.00 +9.00
A ID:
+1.00 +9.00 +9.00
+0.50 +9.00 +9.00
+0.50 +9.00 +9.00
Press return to continue.