2013-03-07：编写一个JAVA程序，用户用键盘只能输入整数，程序输出这些整数的乘积

import java.util,*;
public class Homework20_2{
   public static void main (String args[]){
       Scanner reader=new Scanner(System.in);
       int pro=1;
       while(reader.hasNextInt()){
             int x=reader.nextInt();
       pro=pro*x;
       }
       System.out.printf("个数的乘积为%d\n",pro);
   }
}