随机数

import java.util.Random;

public class T4 { public static void main(String[] args) { Random sc=new Random();

int i=sc.nextInt(9000)+1000; System.out.print("请输入4位会员卡号："+i); int ge=i%10; int shi=i/10%10; int bai=i/10/10%10; int qian=i/1000; System.out.println(); if(ge+shi+bai+qian>20){ System.out.println("会员卡号"+i+"各位之和："+(ge+shi+bai+qian)); System.out.println("会员卡号"+i+"是幸运客户"); }else{ System.out.println("会员卡号"+i+"各位之和："+(ge+shi+bai+qian)); System.out.println("会员卡号"+i+"不是幸运客户"); } }

}