Problem:
Sum of Numbers

Write a program which reads an integer and prints sum of its digits.

Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main {

    public static void main(String[] args) {
        char[] c=new char[1];
        int sum;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try {
            String str = reader.readLine();
            while(true){
                sum=0;
                for(int i=0;i<str.length();i++){
                    str.getChars(i,i+1,c,0);
                    sum+=c[0]-'0';
                }
                System.out.println(sum);
                str=reader.readLine();
                if(str.equals("0"))break;
            }
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}