Mathc initiation/Fichiers c : c25cc
Apparence
Installer et compiler ces fichiers dans votre répertoire de travail.
c16c.c |
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/* --------------------------------- */
/* save as c16c.c */
/* --------------------------------- */
#include "x_hfile.h"
#include "fc.h"
/* --------------------------------- */
int main(void)
{
double h = .00001;
pt2d p = i_pt2d(0.5,0.2);
clrscrn();
printf(" f : x,y-> %s\n\n", feq );
printf(" f_x : x,y-> %s\n\n\n",Dfeq_x);
printf(" f_x(%0.2f,%0.2f) = %0.9f with the equation\n\n",
p.x,p.y, f_x( p.x,p.y ));
printf(" f_x(%0.2f,%0.2f) = %0.9f with the formula \n\n",
p.x,p.y, fxy_x(f,h,p));
stop();
clrscrn();
printf(" f : x,y-> %s\n\n", feq );
printf(" f_y : x,y-> %s\n\n\n",Dfeq_y);
printf(" f_y(%0.2f,%0.2f) = %0.9f with the equation\n\n",
p.x,p.y, f_y( p.x,p.y ));
printf(" f_y(%0.2f,%0.2f) = %0.9f with the formula \n\n",
p.x,p.y, fxy_y(f,h,p));
stop();
return 0;
}
/* --------------------------------- */
/* --------------------------------- */
Essayez avec h = .1, h = .01, h = .001, h = .0001, h = .00001 pour observer l'augmentation de la précision des calculs.
Exemple de sortie écran :
f : x,y-> exp(2*x+3*y)
f_x : x,y-> 2*exp(2*x+3*y)
f_x(0.50,0.20) = 9.906064849 with the equation
f_x(0.50,0.20) = 9.906064849 with the formula
Press return to continue.
Exemple de sortie écran :
f : x,y-> exp(2*x+3*y)
f_y : x,y-> 3*exp(2*x+3*y)
f_y(0.50,0.20) = 14.859097273 with the equation
f_y(0.50,0.20) = 14.859097275 with the formula
Press return to continue.