题解 | 数位之和

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int sum=0;
        while(a!=0){
            sum = sum+a%10;
            a = a/10;
        }
         
        System.out.print(sum);
    }
}