上机练习2

package com.test;

import java.util.Scanner;

public class t02 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int i = sc.nextInt();
int a = i / 1000;
int b = i / 100 % 10;
int c = i / 10 % 10;
int d = i % 10;

System.out.println(a + b + c + d);

}

}