/* --------------------------------- */
/* save as c3d3.c                     */
/* --------------------------------- */
#include "x_hfile.h"
#include      "fd.h"
/* --------------------------------- */
int main(void)
{
   int n = 6;

double FirstApproximation = -1.5;

 clrscrn();
 
 printf(" Use Newton's method to approximate \n" 
        " the smallest real root of :\n\n" 
        " f : x-> %s\n\n\n" 
        " On a graph of f, you can see that, the smallest\n" 
        " real root of f is between -2.0 and -1.0.\n\n" 
        " Choose x = %.1f as a first approximation.\n\n", 
          feq,FirstApproximation);
 stop();

 clrscrn();
 printf(" As a first approximation x = %.1f \n\n"
        " The Newton's method give :        \n\n",FirstApproximation);
        
 p_Newton_s_Method(FirstApproximation, n, f, Df);
 
 printf(" f(%.15f) = %.15f\n\n",  
              Newton_s_Method(FirstApproximation, n, f, Df)
           ,f(Newton_s_Method(FirstApproximation, n, f, Df)));
 stop();

 return 0;
}