View Code of Problem 48

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	double  n,a[100];
	a[1]=1;a[2]=2;
	for(int i=3;i<100;i++)
	  a[i]=a[i-1]+a[i-2];
	
	double sum;
	cin>>n;
	
	for(int i=1;i<=n;i++)
	{
		sum=sum+(a[i+1]/a[i]);
	}
	 
	 cout<<fixed<<setprecision(6)<<sum<<endl;
}