Mathc initiation/Fichiers c : c27cd

Sommaire

Installer et compiler ces fichiers dans votre répertoire de travail.

	c02f.c

/* --------------------------------- */
/* save as c02f.c                    */
/* --------------------------------- */
#include "x_hfile.h"
#include      "ff.h"
/* --------------------------------- */
int main(void)
{
double h = .0001;
pt3d   p = i_pt3d(2,-3,1);
v3d    u = grad_fxyz(f,h,p);

 
 clrscrn();
 printf(" Let f be a function of three variables.\n\n");
 printf(" The Gradiant of f is the vector function given by :\n\n\n");
 printf(" grad f(x,y,z) = f_x(x,y,z)i+f_y(x,y,z)j+f_z(x,y,z)k\n\n\n\n\n\n");


 printf(" If f   : x,y,z-> %s\n\n",feq);
  printf(" Find the gradient of f at the point p(%+.1f,%+.1f,%+.1f)\n\n\n",
           p.x,p.y,p.z);    

  printf(" grad f(x,y,z)]p = %+.3fi %+.3fj %+.3fk  \n\n\n",u.i,u.j,u.k);

 stop();

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

grad f(x,y,z)]p = Le gradient au point p. 

Remarque : les calculs se font pendant l'initialisation des variables.

Exemple de sortie écran :

 Let f be a function of three variables.

 The Gradiant of f is the vector function given by :


 grad f(x,y,z) = f_x(x,y,z)i+f_y(x,y,z)j+f_z(x,y,z)k





 If f   : x,y,z-> y*z**3 - 2*x**2

 Find the gradient of f at the point p(+2.0,-3.0,+1.0)


 grad f(x,y,z)]p = -8.000i +1.000j -9.000k  


 Press return to continue.