View Code of Problem 71

#include <stdio.h>
#include <stdlib.h>

int main()
{
	int n,i;
	scanf("%d",&n);
	double a[1000]={1,2};
	double b[1000]={2,3};
	for(i=2;i<=n+1;i++){
		a[i]=a[i-1]+a[i-2];
		b[i]=b[i-1]+b[i-2];
	}
	double sum=0;
	for(i=0;i<n;i++){
		sum=sum+b[i]/a[i];
	}
	printf("%.02lf",sum);
 }