package eecs1022.finala;

/**
 * This question is worth 2.5 marks.  No partial marks will be awarded for this question.
 *
 * @author Franck van Breugel
 */
public class Question6
{
    /**
     * Returns the sum of the digits occurring in the given string.  You may assume that
     * the string is not null and not empty
     *
     * @param s a string.
     * @return the sum of the digits occurring in the given string.
     */
    public static int sum(String s)
    {
	int sum = 0;
	for (int i = 0; i < s.length(); i++)
	{
	    char letter = s.charAt(i);
	    if (letter >= '0' && letter <= '9')
	    {
		int number = letter - '0';
		sum = sum + number;
	    }
	}
        return sum;
    }
    /**
     * Tests method.  You may add more test cases.
     *
     * @param args not applicable.
     */
    public static void main(String[] args)
    {
        System.out.println(Question6.sum("1234"));
        System.out.println(Question6.sum("1a5h5x1"));
        System.out.println(Question6.sum("12h56s9"));
        System.out.println(Question6.sum("aaaaaa4aaaaa"));
        System.out.println(Question6.sum("5a"));
    }
}