Linear Algebra and the C Language/a09n

Install and compile this file in your working directory.

/* ------------------------------------ */
/*  Save as :   c00b.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
#define   RAb R3
#define   CA  C3
#define   Cb  C1
/* ------------------------------------ */
# define FREEV C1
/* ------------------------------------ */
/* ------------------------------------ */
int main(void)
{
double ab[RAb*(CA+C1)]={
    +346,     +262,      +43,     -578, 
    -560,     +831,     -984,     -731, 
    +346,     +262,      +43,     -578      
};

double **Ab      = ca_A_mR(ab,i_Abr_Ac_bc_mR(RAb, CA, Cb));
double **Ab_free =            i_Abr_Ac_bc_mR(CA,  CA, Cb + FREEV);
double **b_free  =                      i_mR(CA,      Cb + FREEV); 

  clrscrn();
  printf(" Ab :");
  p_mR(Ab, S10,P4,C10);
  
  printf("\n Ab :  gj_PP_mR(Ab,NO) :");
  gj_PP_mR(Ab,NO);
  p_mR(Ab, S10,P4,C10);
  stop();
  
  clrscrn(); 
  printf(" Ab :");
  p_mR(Ab, S10,P4,C10);
   
  put_zeroR_mR(Ab,Ab_free);  
  printf(" Ab_free : put_zeroR_mR(Ab,Ab_free);");  
  p_mR(Ab_free, S10,P4,C10);  
  
  put_freeV_mR(Ab_free);
  printf(" Ab_free : put_freeV_mR(Ab_free);");  
  p_mR(Ab_free, S10,P4,C10);  

  printf("\n Ab_free : gj_PP_mR(Ab_free,YES);");
  gj_PP_mR(Ab_free,YES);  
  p_mR(Ab_free, S10,P4,C10);  
  stop();	
  
  clrscrn();
  c_Ab_b_mR(Ab_free,b_free);
  printf(" b_free :"); 
  p_mR(b_free, S10,P4,C7);
  printf("         b        FREEV");
  p_freeV(b_free, S8,P4);
  stop();

  f_mR(Ab);
  f_mR(Ab_free);
  f_mR(b_free);
  
  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */

Screen output example:

 Ab :
 +346.0000  +262.0000   +43.0000  -578.0000 
 -560.0000  +831.0000  -984.0000  -731.0000 
 +346.0000  +262.0000   +43.0000  -578.0000 


 Ab :  gj_PP_mR(Ab,NO) :
   +1.0000    -1.4839    +1.7571    +1.3054 
   +0.0000    +1.0000    -0.7286    -1.3278 
   +0.0000    +0.0000    +0.0000    +0.0000 

 Press return to continue. 


 Ab :
   +1.0000    -1.4839    +1.7571    +1.3054 
   +0.0000    +1.0000    -0.7286    -1.3278 
   +0.0000    +0.0000    +0.0000    +0.0000 

 Ab_free : put_zeroR_mR(Ab,Ab_free);
   +1.0000    -1.4839    +1.7571    +1.3054    +0.0000 
   +0.0000    +1.0000    -0.7286    -1.3278    +0.0000 
   +0.0000    +0.0000    +0.0000    +0.0000    +0.0000 

 Ab_free : put_freeV_mR(Ab_free);
   +1.0000    -1.4839    +1.7571    +1.3054    +0.0000 
   +0.0000    +1.0000    -0.7286    -1.3278    +0.0000 
   +0.0000    +0.0000    +1.0000    +0.0000    +1.0000 


 Ab_free : gj_PP_mR(Ab_free,YES);
   +1.0000    +0.0000    +0.0000    -0.6651    -0.6760 
   +0.0000    +1.0000    +0.0000    -1.3278    +0.7286 
   +0.0000    +0.0000    +1.0000    +0.0000    +1.0000 

 Press return to continue. 


 b_free :
   -0.6651    -0.6760 
   -1.3278    +0.7286 
   +0.0000    +1.0000 

         b        FREEV
 x1 =   -0.6651  -0.6760*v
 x2 =   -1.3278  +0.7286*v
 x3 =   +0.0000  +1.0000*v

 Press return to continue.