View Code of Problem 48

#include <stdio.h>
int main(){
	int i,n;
	double a[11],sum=0.0;
	a[0]=1.0;
	a[1]=2.0;
	scanf("%d",&n);
	for(i=0;i<=8;i++){
		a[i+2]=a[i]+a[i+1];
	}
	for(i=0;i<n;i++){
		sum=sum+a[i+1]/a[i];
	}
	printf("\n%.6lf\n",sum);
	return 0;
}