Mathc matrices/e1504
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gj04.c |
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/* ------------------------------------ */
/* Save as : gj04.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
double **xx_sort_r_mR(
double **Ab
)
{
double pivot;
int c;
int r;
int r_pivot = R1;
for ( c=C1; c<Ab[C_SIZE_A][C0]; c++)
{
r = r_pivot;
pivot = 0.;
while( (pivot<ERROR_E) && r<Ab[R_SIZE][C0] )
{
pivot = fabs( Ab[r][c] );
if(pivot>ERROR_E)
{
swapR_mR(Ab, r, r_pivot);
r_pivot++;
}
r++;
}
}
return(Ab);
}
/* ------------------------------------ */
/* ------------------------------------ */
double **XX_gj_TP_mR(
double **Ab
)
{
gj1_T_mR(Ab);
sort_c_mR(Ab);
xx_sort_r_mR(Ab);
return(Ab);
}
/* ------------------------------------ */
/* ------------------------------------ */
void fun(int r)
{
double **A = i_mR(r,r);
double **b = i_mR(r,C1);
double **Ab = i_Abr_Ac_bc_mR(r,r,C1);
/* i_Abr_Ac_bc_mR(R_Ab,C_A,C_b)); */
do
{
r_mR(A,999.);
printf(".");
}while(!det_R(A));
r_mR(b,999.);
c_A_b_Ab_mR(A,b,Ab);
clrscrn();
printf(" Copy/Past into the octave window.\n\n");
p_Octave_mR(Ab,"Ab",P0);
printf("\n rref(Ab,.00000000001)\n\n");
stop();
clrscrn();
XX_gj_TP_mR(Ab);
printf(" gj_TP_mR(Ab) :\n");
p_mR(Ab,S10,P4,C7);
f_mR(Ab);
f_mR(b);
f_mR(A);
}
/* ------------------------------------ */
int main(void)
{
time_t t;
srand(time(&t));
do
{
fun(RC5);
} while(stop_w());
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Nous avons introduit la fonction sort_r_mR(); que nous allons étudier. Comme cette fonction est dans la bibliothèque, nous allons l'appeler xx_sort_r_mR();
Exemple de sortie écran :
------------------------------------
Copy/Past into the octave window.
Ab=[
+984,-597,-417,-139;
-239,-95,+130,+972;
+584,+478,-139,-957]
rref(Ab,.00000000001)
Press return to continue.
gj_TP_mR(Ab) :
+1.00000 +0.00000 +0.00000 +3.16279
+0.00000 +1.00000 +0.00000 -2.54112
+0.00000 +0.00000 +1.00000 +11.43461
Press return to continue
Press X to stop