Mathc initiation/Fichiers c : c23cc

Sommaire

Installer et compiler ces fichiers dans votre répertoire de travail.

	c3c.c

/* --------------------------------- */
/* save as c3c.c                     */
/* --------------------------------- */
#include "x_hfile.h"
#include      "fc.h"
/* --------------------------------- */
int main(void)
{
double c  = 1.;

 clrscrn();
 printf("  f : x-> %s\n\n" 
        " Df : x-> %s\n\n\n", feq, Dfeq);

 printf("  Compute the derivative of f when x = %0.3f\n\n", c);   
  
 printf("  with   Df(%0.3f) = %0.8f    \n",c, Df(c));
 printf("  with fx_x(%0.3f) = %0.8f\n\n\n",c, fx_x(f,c,H));
 stop();
 
 clrscrn();
 printf("  The equation of the tangente \n\n"); 
 eq_Tan(c, f, Df);
 
 printf("  The equation of the tangente (with the function : fx_x();)\n\n"); 
 eq_tan(c, f);  
 stop();
 
 clrscrn();
 printf("  The equation of the normal \n\n"); 
 eq_Norm(c, f, Df);
 
 printf("  The equation of the normal (with the function : fx_x();)\n\n"); 
 eq_norm(c, f); 
 
 stop();


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

Vérifions notre travail avec gnuplot.

Fichier de commande gnuplot :

# ---------------------
# Copy and past this file into the screen of gnuplot
#
#
set zeroaxis lt 3 lw 1
set grid
plot [ -10.:10.] [-5.:5.]\
        x*sin(cos(x)),\
      -0.207*x +0.722,\
       4.826*x -4.312
reset
# ---------------------

Exemple de sortie écran :

  f : x-> x*sin(cos(x))

 Df : x-> sin(cos(x))-x*cos(cos(x))*sin(x)


  Compute the derivative of f when x = 1.000

  with   Df(1.000) = -0.20721089    
  with fx_x(1.000) = -0.20721089


 Press return to continue. 


**************************


  The equation of the tangente 

 -0.207*x +0.722


  The equation of the tangente (with the function : fx_x();)

 -0.207*x +0.722


 Press return to continue. 


*************************


  The equation of the normal 

 4.826*x -4.312


  The equation of the normal (with the function : fx_x();)

 4.826*x -4.312


 Press return to continue.