View Code of Problem 71

#include <stdio.h>
int main()
{
	int n,i;
	scanf("%d",&n);
	float a[n+1];
	float sum=0.0;
	a[0]=1.0;
	a[1]=2.0;
	for(i=1;i<=n-1;i++)
	   a[i+1]=a[i]+a[i-1];
	for(i=0;i<=n-1;i++)
	sum+=a[i+1]/a[i];
	printf("%.2f\n",sum);
	return 0;
	
	
}