import java.util.Scanner;public class Luck{public static void main(String[] args){
System.out.println("請輸入您的4為會員卡號");
Scanner num = new Scanner(System.in); int number = num.nextInt(); int a = number/1000; //千位
int b = number/1000/100; //百位
int c = number/100/10; //十位
int d = number/10; //個位
int e = a+b+c+d;
System.out.println(e);if(a+b+c+d>20){
System.out.println("中獎");} else{
System.out.println("沒中");}}
}假如我輸入了5位數怎么寫能通知出錯并且提示？？？
java基礎問題求指教
aluckdog
2018-09-03 13:25:38
