View Code of Problem 48

#include <stdio.h>
int main()
{
	int n,i;
	scanf("%d",&n);
	double sum=0,fenzi=1,fenmu =1,fenshu,temp;
	for(i=0;i<n;++i)
	{
		temp = fenzi;
		fenzi = fenzi+fenmu;
		fenmu = temp;
		fenshu = fenzi/fenmu;
		sum = sum +fenshu;		
	}
	printf("%.6f",sum);
	return 0;
}