View Code of Problem 48

#include<stdio.h>
#include<math.h>
#include<string.h>
int main()
{
	int i,n;
	int a[11]={2,3};
	double s=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		if(i==0||i==1)
			s=s+1.0*(a[i])/(i+1);
		else
		{   a[i]=a[i-1]+a[i-2];
			s=s+1.0*(a[i])/(i+1);
		}
	}
	printf("%.6lf\n",s);
  return 0;
}