JAVA第三次作业

import java.util.Scanner;
public class add {
 public static int sumDigits(long n){
  int sum=0;
  while(n>0){
   int m=(int)(n%10);
   sum=sum+m;
   n=n/10;
  }
  return sum;
 }
 public static void main(String[] args) {
  try{
   System.out.println("请输入数字：");
   Scanner sc=new Scanner(System.in);
   long l=sc.nextLong();
   System.out.println("输入数字的各位数之和为"+sumDigits(l));
  }catch(Exception e){
   System.out.println("您输入的不是数字！");
  }
 }
}