条件运算符（三目运算符）：根据会员卡号各位之和判断是否中奖

package lianxi;

import java.util.Scanner;

public class LianXi {
    //输入一个四位卡号，控制台计算会员卡号的各位数，并计算各位之和；
    static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {
        System.out.println("请输入一个四位卡号");
        int num = sc.nextInt();
        //会员卡号
        System.out.println("会员卡号是："+num);
        int qianwei = num/1000;
        int baiwei = num/100%10;
        int shiwei = num/10%10;
        int gewei = num%10;
        System.out.println("千位："+qianwei+",百位："+baiwei+",十位："+shiwei+",个位："+gewei);
        int sum = qianwei + baiwei + shiwei + gewei;
        int average = sum/4;
        System.out.println("各位上数字之和："+sum);
        System.out.println("平均是："+average);
        String result = (sum>20)?"您中奖了！奖品是????！" :"很遗憾您没中奖";
        System.out.println("会员卡号"+num+"的会员，"+result);

    }

}