lieri111的专栏

File file = new File("/home/china/work/abc.xml"); File fa = new File("/home/china/work/a.xml"); File fb = new File("/home/china/work/b.xml"); File fc = new File("/home/china

package com.cn.test;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException

public class Jiecheng { public static void main(String[] args) { long i,j,sum; j = 1; sum = 0; for(i=1;i<=20;i++){ j = j*i; sum = sum + j; } System.out.println("---"+sum); }}