View Code of Problem 48

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