View Code of Problem 48

#include <stdio.h>
int main()
{
	int n,i;
	double p,q,t,sum;
	scanf("%d",&n);
	p=2;
	q=1;
	sum=0;
	if(n==1)
		printf("%.6lf",p/q);
	
	else 
	{
		for(i=2;i<=n;i++)
		{
			t=p;
			p=p+q;
			q=t;
			sum=sum+p/q;
		}
		printf("%.6lf",sum+2);
	}
	return 0;
}