package demo;
import java.util.Scanner;
public class bbb {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入一个0-1000之间的整数");
int a =(int)input.nextDouble();
if(a>999||a<0) {
System.out.println("输入有误");
}
else if(a>0 && a<10){
System.out.println("The sum of the digits is "+ a);
}
else if(a>9 && a<100) {
int b=(a/10) + (a%10);
System.out.println("The sum of the digits is "+ b);
}
else if(a>99 && a<1000) {
int c=(a/100)+(a%100)+(a%10%10);
System.out.println("The sum of the digits is "+ c);
}
}