View Code of Problem 48

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