1、演習1
2.演習2
3.演習3
4.演習4
パッケージcom.z1。
インポートjava.util.Scanner;
public class lucky {
static Scanner sc = new Scanner(System.in);
public static void main(String[] args) {
System.out.println("请输入4位会员卡号：");
int number = sc.nextInt();
int qianwei = number/1000;
int baiwei = number%1000/100;
int shiwei = number/10%10;
int gewei = number%10;
System.out.println("千位数："+qianwei+"，百位数："+baiwei+"，十位数"+shiwei+"，个位数"+gewei);
int sumNumber = qianwei + baiwei + shiwei + gewei;
System.out.println("会员卡号"+number+"的各位之和是："+sumNumber);
if(sumNumber>20) {
System.out.println("会员卡号"+number+"的会员，您中奖了! 奖品是mp3！");
}else {
System.out.println("会员卡号：\"+number+\"的会员，您没有中奖");
}
}
}