package eecs1022.finalb;

/**
 * This question is worth 2.5 marks.  No partial marks will be awarded for this question.
 */
public class Question7
{
    /**
     * Returns the number of characters that occur more than once in the given string.
     * You may assume that the string is not null and not empty.  You may may also assume
     * that all characters are lower case letters.
     *
     * @param s a string.
     * @return the number of characters that occur more than once in the given string.
     */
    public static int moreThanOnce(String s)
    {
	int number = 0;
	for (char c = 'a'; c <= 'z'; c++)
	{
	    int count = 0;
	    for (int i = 0; i < s.length(); i++)
	    {
		char letter = s.charAt(i);
		if (letter == c)
		{
		    count++;
		}
	    }
	    if (count > 1)
	    {
		number++;
	    }
	}
        return number;
    }

    /**
     * Tests method.  You may add more test cases.
     *
     * @param args not applicable.
     */
    public static void main(String[] args)
    {
        System.out.println(Question7.moreThanOnce("a"));
        System.out.println(Question7.moreThanOnce("accb"));
        System.out.println(Question7.moreThanOnce("abacb"));
        System.out.println(Question7.moreThanOnce("abca"));
        System.out.println(Question7.moreThanOnce("aaabbcc"));
    }
}