1 //程序员：马相露
2
3 package demo;
4 import java.util.Scanner;
5 public class Lk {
6
7 public static void main(String[] args) {
8
9 Scanner input = new Scanner(System.in);
10 System.out.println("请输入一个0-1000之间的整数");
11 int a =(int)input.nextDouble();
12
13 if(a>999||a<0) {
14 System.out.println("输入有误");
15
16 }
17 else if(a>0 && a<10){
18 System.out.println("The sum of the digits is "+ a);
19 }
20 else if(a>9 && a<100) {
21 int b=(a/10) + (a%10);
22 System.out.println("The sum of the digits is "+ b);
23 }
24 else if(a>99 && a<1000) {
25 int c=(a/100)+(a%100)+(a%10%10);
26 System.out.println("The sum of the digits is "+ c);
27 }
28 }
29
30 }
