View Code of Problem 48

#include <stdio.h>
int main()
{
  int n,t;
  double i,j,sum;
  scanf("%d",&n);
  i=2.0;
  j=1.0;
  sum=0;
  for (t=2;t<=n;t++)
  {
    i=i+j;
    j=i-j;
    sum=sum+i/j;
  }
  printf("%.6f",sum+2.0);
  return 0;
}