Poj Solution 1519

http://poj.org/problem?id=1519

//* @author ������<hongxp11@163.com>
import java.util.Scanner;

public class Main {
 public static void main(String[] args) {
   Scanner in = new Scanner(System.in);
    while (true) {
    String number = in.next();
    if (number.equals("0")) {
        break;
    }
    int len = number.length();
    int sum = 0;
    for (int i = 0; i < len; i++) {
        sum += number.charAt(i) - '0';
    }
    int result = sum % 9 == 0 ? 9 : sum % 9;
    System.out.println(result);
     }
  }
}