Mathc matrices/c091a

Application

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	inv_r.c

/* ------------------------------------ */
/*  Save as :   inv_r.c                 */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double **A   = i_mR(r,r);
double **Inv = i_mR(r,r);

  clrscrn();
  printf(" A\n");
  p_mR(r_mR(A,9999.),S8,P0,C6);
  stop();

  clrscrn();
  printf(" invgj_mR(A,invA); gauss jordan (AId)\n");
  pE_mR(invgj_mR(A,Inv),S12,P4,C6);
  printf(" inv_mR(A,Inv);  det,...,adjoint,... \n");
  pE_mR(inv_mR(A,Inv),S12,P4,C6);
  stop();

  clrscrn();
  printf(" Copy/Past into the octave window.\n\n");
  p_Octave_mR(A,"A",P0);
  printf(" inv(A)\n");
  pE_mR(Inv,S12,P4,C6);

  f_mR(Inv);
  f_mR(A);
}
/* ------------------------------------ */
int main(void)
{
time_t t;

  srand(time(&t));
  
do
{
   fun(rp_I(C2)+C4);

} while(stop_w());

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

Exemple de sortie écran :

 A

     -57    +6812    +5568 
   +5330    +1020    +7124 
   +8836    -4887    -1189 

 Press return to continue. 


 invgj_mR(A,invA); gauss jordan (AId)

 +1.2226e-04  -6.9537e-05  +1.5591e-04 
 +2.5209e-04  -1.7876e-04  +1.0946e-04 
 -1.2757e-04  +2.1799e-04  -1.3232e-04 

 inv_mR(A,Inv);  det,...,adjoint,... 

 +1.2226e-04  -6.9537e-05  +1.5591e-04 
 +2.5209e-04  -1.7876e-04  +1.0946e-04 
 -1.2757e-04  +2.1799e-04  -1.3232e-04 

 Press return to continue. 


 Copy/Past into the octave window.

 A=[
-57,+6812,+5568;
+5330,+1020,+7124;
+8836,-4887,-1189]

 inv(A)

 +1.2226e-04  -6.9537e-05  +1.5591e-04 
 +2.5209e-04  -1.7876e-04  +1.0946e-04 
 -1.2757e-04  +2.1799e-04  -1.3232e-04 


 Press return to continue
 Press X      to stop