411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0g3
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__NOTOC__
Install and compile this file in your working directory.
/* ------------------------------------ */
/* Save as : c00e.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
int main(void)
{
double a[R3*C3]={ 1,1,-8,
0,9, 9,
0,0, 1};
double id[R3*C3]={ 1,0, 8,
0,1,-9,
0,0, 1};
double **A = ca_A_mR(a, i_mR(R3,C3));
double **ID = ca_A_mR(id,i_mR(R3,C3));
double **IDA = mul_mR(ID,A,i_mR(R3,C3));
clrscrn();
printf(" Zero above the pivot \n\n");
printf(" ID:");
p_mR(ID, S3,P0,C6);
printf(" A:");
p_mR(A, S3,P0,C6);
printf(" ID A:");
p_mR(IDA, S3,P1,C6);
stop();
f_mR(A);
f_mR(ID);
f_mR(IDA);
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Zero above the pivot:
Screen output example:
Zero above the pivot
ID:
+1 +0 +8
+0 +1 -9
+0 +0 +1
A:
+1 +1 -8
+0 +9 +9
+0 +0 +1
ID A:
+1.0 +1.0 +0.0
+0.0 +9.0 +0.0
+0.0 +0.0 +1.0
Press return to continue.