View Code of Problem 48

#include<stdio.h>
#include<string.h>
 
int main() {
	int n;
	scanf("%d", &n);
	int a[15];
	a[0] = 1;a[1] = 2;
	for (int i = 2;i < 15;i++) {
		a[i] = a[i - 1] + a[i - 2];
	}
	double sum = 0;
	for (int i = 0;i < n;i++) {
		sum = sum + (double)a[i + 1] / (double)a[i];
 
	}
	printf("%.6f", sum);
        return 0;
 
 
}