int main(int argc, char *argv[])
{
  double sum=0,x;
  double chisl=1;
  double znam=2;
  double e=0.00001;
  int n=1;
  printf("Input x: ");
  scanf("%lf",&x);
  do
  {
    sum+=(chisl/znam)*pow(x,n);
    ++chisl;
    ++znam;
    ++n;
}
  while(sum==0 || sum>e);
  printf("sum=%lf",sum);
  system("PAUSE");	
  return 0;
}