1. 商场推出幸运抽奖活动,抽奖规则如下:顾客的四位会员卡号的各位数字之和大于20,则为幸运顾客 package ggjj; import java.util.Scanner; public class Shiyaner { public static void main(String[] args) { Scanner in=new Scanner(System.in); int cardnum;int a;int b;int c;int d; System.out....