hdu 1012 u Calculate (水)

http://acm.hdu.edu.cn/showproblem.php?pid=1012

/*2011-9-7author:BearFly1990*/package acm.hdu.tests;import java.util.Arrays;public class HDU_1012 {    public static void main(String[] args) {               int[] f = new int[10];        double[] e = new double[10];        Arrays.fill(f, 0);        Arrays.fill(e,0.0);        f[0] = 1; f[1] = 1; f[2] = 2;        e[0] = 1.0; e[1] = 2.0; e[2] = 2.5;        System.out.printf("n e\r\n");        System.out.printf("- -----------\r\n");        System.out.printf("0 1\r\n");        System.out.printf("1 2\r\n");        System.out.printf("2 2.5\r\n");        for(int i=3; i<10; ++i){            f[i]=f[i-1]*i;            e[i]=e[i-1]+1.0/f[i];            System.out.printf("%d %.9f\r\n",i,e[i]);        }    }}