Linear Algebra and the C Language/a0fz

/* ------------------------------------ */
/*  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.

 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.