/*----------------------------------------*/
/*　Newton法                              */
/*----------------------------------------*/
#include<stdio.h>
#include <stdlib.h>
#include<math.h>

main(void)
{
  double x,f,ff;

  x=-3.;  f=x-exp(-x);

  while( fabs(f) > 1e-6 ){
     f = x - exp(-x);
     ff = 1. + exp(-x);
     x=x-f/ff;
     printf("%f %f %f \n",(float)x,(float)f,(float)ff);
  }
  
}