View Code of Problem 48

#include<stdio.h>
main()
{
	double fenmu[10],fenzi[10];
	int i,n;
	double sum=0,mul;
	fenmu[0]=1;
	fenmu[1]=2;
	fenzi[0]=2;
	fenzi[1]=3;
	for(i=2;i<10;i++)
	{
		fenmu[i]=fenmu[i-1]+fenmu[i-2];
		fenzi[i]=fenzi[i-1]+fenzi[i-2];
	}
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		mul=fenzi[i]/fenmu[i];
		sum+=mul;
	}
	printf("%.6f\n",sum);
}