#include <stdio.h>
int main ()
{
double e = 1.0;
double faktor = 1.0;
double e_alt = 1.0;
double i = 2.0;
puts ("\x1b[2J");
puts ("Berechnung von e\n");
do
  {
  e_alt = e;
  e = e + 1.0 / faktor;
  faktor = faktor * i;
  i = 1 + 1.0;
  }
  while (e - e_alt > 0.1);
printf("\ne ist: %f",e);
return 0;
}