Mathc matrices/c21a

Application

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	c00h.c

/* ------------------------------------ */
/*  Save as :   c00h.c                  */
/* ------------------------------------ */
#include      "v_a.h"
#include "dot_diag.h"
/* ------------------------------------ */
void fun(void)
{
double a[R2*C2]={ 2,0,
                  0,3};
double u[R2*C1]={ 1,
                  1};
double v[R2*C1]={ 3,
                  2};                  
              
double **A = ca_A_mR(a,i_mR(R2,C2));
double **U = ca_A_mR(u,i_mR(R2,C1));
double **V = ca_A_mR(v,i_mR(R2,C1));

  clrscrn();
  printf(" Cosine of the Angle Between Vectors U and V :\n\n"); 
  
  printf(" A :");
  p_mR(A,S3,P0,C6);
  printf(" U :");
  p_mR(U,S3,P0,C6);
  printf(" V :");
  p_mR(V,S3,P0,C6);
 
  printf(" <U,V> = %.0f \n\n", dot_Diag_R(A,U,V));

  printf(" ||U|| = %.4f \n\n", norm_Diag_R(A,U));
  printf(" ||V|| = %.4f \n\n", norm_Diag_R(A,V));
  
  printf(" cos(alpha) = %.4f \n\n", 
  
                    dot_Diag_R(A,U,V)
                          / 
             ( norm_Diag_R(A,U) * norm_Diag_R(A,V) ));  
  
  f_mR(A);
  f_mR(U);
  f_mR(V);
}
/* ------------------------------------ */
int main(void)
{

  fun();
  
  stop();

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

Exemple de sortie écran :

 Cosine of the Angle Between Vectors U and V :

 A :
 +2  +0 
 +0  +3 

 U :
 +1 
 +1 

 V :
 +3 
 +2 

 <U,V> = 12 

 ||U|| = 2.2361 

 ||V|| = 5.4772 

 cos(alpha) = 0.9798 

 Press return to continue.