View Code of Problem 71

#include<stdio.h>
int main(){
	int n, f1[100], f2[100];
	float sum = 0.0;
	f1[0] = 2;
	f1[1] = 3;
	f2[0] = 1;
	f2[1] = 2;
	scanf("%d",&n);
	if(n == 1){
		sum = f1[0]/f2[0];
	} else {
		int i;
		sum = (float)f1[0]/f2[0] + (float)f1[1]/f2[1];
		for(i = 2; i < n; i ++){
			f1[i] = f1[i - 1] + f1[i - 2];
			f2[i] = f2[i - 1] + f2[i - 2];
			sum = sum + (float)f1[i]/f2[i];
		}
	}
	printf("%.2f\n",sum);
	return 0;
}