View Code of Problem 48

#include<stdio.h>
int main()
{
  int a=2,b=1,n,i;
  double sum=0.0,d;
  scanf("%d",&n);
  for(i=1;i<=n;i++)
  {
    d=a/b;
    sum+=d;
    a=a+b;
    b=a;
  }
  printf("%.6f",sum);
  return 0;
}