View Code of Problem 48

#include<stdio.h>

int main() {
	int n, i;
	float sum = 0;
	scanf("%d", &n);
	float a[n+1], b[n];
	a[0] = 1;
	a[1] = 2;
	for(i=2; i<=n; i++)
		a[i] = a[i-1] + a[i-2];
	for(i=0; i<n; i++)
		b[i] = a[i+1] / a[i];
	for(i=0; i<n; i++)
		sum += b[i];
	printf("%.6f\n", sum);
	return 0;
}