Mathc initiation/Fichiers c : c14a2

Installer et compiler ces fichiers dans votre répertoire de travail.

	`c2a.c`

/* ---------------------------------- */
/* save as c2a.c                      */
/* ---------------------------------- */
#include "x_hfile.h"
#include       "fa.h"
/* ---------------------------------- */
int main(void)
{
int      n =  2*500;
double   a =  0.;
double   b =  1.;

 clrscrn();

 printf(" With the Simpson's rule.    (n = %d)\n\n"
        "    (%.3f\n"
        " int(      (%s) * dx = %.6f\n"
        "    (%.3f\n\n\n\n",n,  b, feq, simpson(f,a,b,n), a);

 printf(" With the antiderivative of f.\n\n"
        " F(x) = %s \n\n\n" 
        " F(%.3f) -  F(%.3f)  = %.6f \n\n\n", Feq, b,a, F(b)-F(a));
 
 stop();

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

Verifier avec mathematica : Free: wolframalpha.com

integral (sqrt(x))  dx from 0 to 1

Exemple de sortie écran :

 With the Simpson's rule.    (n = 1000)

    (1.000
 int(      (sqrt(x)) * dx = 0.666664
    (0.000



 With the antiderivative of f.

 F(x) =  (2./3.)* x**(3./2.) 


 F(1.000) -  F(0.000)  = 0.666667 


 Press return to continue.