411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0fz
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Install and compile this file in your working directory.
/* ------------------------------------ */
/* Save as : c00a.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
int main(void)
{
double a[R3*C3]={ 1,1,1,
2,2,2,
3,3,3 };
double id[R3*C3]={ 0,1,0,
1,0,0,
0,0,1 };
double **A = ca_A_mR(a, i_mR(R3,C3));
double **ID = ca_A_mR(id,i_mR(R3,C3));
double **IDA = mul_mR(ID,A,i_mR(R3,C3));
clrscrn();
printf(" Swap two rows.\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,P0,C6);
stop();
f_mR(A);
f_mR(ID);
f_mR(IDA);
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Swap two rows:
Screen output example:
Swap two rows.
ID:
+0 +1 +0
+1 +0 +0
+0 +0 +1
A:
+1 +1 +1
+2 +2 +2
+3 +3 +3
ID A:
+2 +2 +2
+1 +1 +1
+3 +3 +3
Press return to continue.