Linear Algebra and the C Language/a04q

/* ------------------------------------ */
/*  Save as:   c00c.c                   */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
#define RA R8
#define CA C6
#define Cb C1 
/* ------------------------------------ */
#define FACTOR_E        +1.E-1         
/* ------------------------------------ */
int main(void)
{
double ta[RA*(CA+Cb)]={
/*   I1    I2    I3    I4    I5    I6   */
     -1,   +1,   +1,   +0,   +0,   +0,   
     +0,   +0,   -1,   +1,   -1,   +0,   
     +0,   +0,   +0,   -1,   +1,   +1,   
     +1,   -1,   +0,   +0,   +0,   -1,   
    +15,  +60,   +0,   +0,   +0,   +0,   
     +0,  -60,  +15,  +15,   +0,  +15,   
     +0,   +0,   +0,  -15,  -60,   +0,   
    +15,   +0,  +15,   +0,  -60,  +15
};  

double tb[RA*(CA+Cb)]={
   +0,
   +0,
   +0,
   +0,
  +90,
   +0,
  -90,
   +0
};    

double **A       =    ca_A_mR(ta,     i_mR(RA,CA));    
double **b       =    ca_A_mR(tb,     i_mR(RA,C1));
double **Pinv    = Pinv_Rn_mR(A,      i_mR(CA,RA),FACTOR_E);           
double **x       =     mul_mR(Pinv,b, i_mR(CA,C1));  ;          

  clrscrn();
  printf(" A:");
  p_mR(A, S5,P1,C6);
  printf(" b:");
  p_mR(b, S5,P1,C6);
  stop();
  
  clrscrn();   
  printf(" Pinv = V invS_T U_T ");
  pE_mR(Pinv, S12,P4,C5);   
  
  printf(" x = Pinv b ");   
  p_mR(x, S10,P4,C5);  
  stop();  
  
  f_mR(b);   
  f_mR(A);
  f_mR(Pinv);
  f_mR(x); 

  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */

 A :
 -1.0  +1.0  +1.0  +0.0  +0.0  +0.0 
 +0.0  +0.0  -1.0  +1.0  -1.0  +0.0 
 +0.0  +0.0  +0.0  -1.0  +1.0  +1.0 
 +1.0  -1.0  +0.0  +0.0  +0.0  -1.0 
+15.0 +60.0  +0.0  +0.0  +0.0  +0.0 
 +0.0 -60.0 +15.0 +15.0  +0.0 +15.0 
 +0.0  +0.0  +0.0 -15.0 -60.0  +0.0 
+15.0  +0.0 +15.0  +0.0 -60.0 +15.0 

 b :
 +0.0 
 +0.0 
 +0.0 
 +0.0 
+90.0 
 +0.0 
-90.0 
 +0.0 

 Press return to continue. 

 Pinv = V * invS_T * U_T 
 -3.1111e-01  -8.8889e-02  +8.8889e-02  +3.1111e-01  +1.4444e-02 
 +7.7778e-02  +2.2222e-02  -2.2222e-02  -7.7778e-02  +8.8889e-03 
 +3.6111e-01  -3.6111e-01  -1.3889e-01  +1.3889e-01  +5.5556e-03 
 +8.8889e-02  +3.1111e-01  -3.1111e-01  -8.8889e-02  +7.7778e-03 
 -2.2222e-02  -7.7778e-02  +7.7778e-02  +2.2222e-02  +2.2222e-03 
 -1.3889e-01  +1.3889e-01  +3.6111e-01  -3.6111e-01  +5.5556e-03 

 +4.0741e-03  -7.7778e-03  +1.0741e-02 
 -5.1852e-03  -2.2222e-03  +1.4815e-03 
 +9.2593e-03  -5.5556e-03  +9.2593e-03 
 +1.0741e-02  -1.4444e-02  +4.0741e-03 
 +1.4815e-03  -8.8889e-03  -5.1852e-03 
 +9.2593e-03  -5.5556e-03  +9.2593e-03 

 x = Pinv * b 
   +2.0000 
   +1.0000 
   +1.0000 
   +2.0000 
   +1.0000 
   +1.0000 

 Press return to continue.