private static HashSet <char> parseAlphabet(XElement xAlphabet)
{
xAlphabet = DFAUtilities.RemoveJustNamespaces(xAlphabet);
HashSet <char> alphabet = new HashSet <char>();
foreach (var child in xAlphabet.Elements("symbol"))
{
char element = Convert.ToChar(child.Value.Trim());
alphabet.Add(element);
}
return(alphabet);
}
public static XElement getFeedback(XElement regex, XElement alphabet, XElement attemptNfa, XElement maxGrade)
{
var cleanAttempt = DFAUtilities.RemoveJustNamespaces(attemptNfa).Element("block");
expressions = new HashSet <string>();
wrong = new HashSet <string>();
var feedString = "<ul>";
var tup = recursiveHelper(regex, alphabet, cleanAttempt);
feedString += tup.Item3 + "</ul>";
var grade = 1.0 * int.Parse(maxGrade.Value) * tup.Item1 / expressions.Count;
if (grade == int.Parse(maxGrade.Value))
{
feedString = "Correct!";
}
return(XElement.Parse(string.Format("<div><grade>{0}</grade><feedback>{1}</feedback></div>", (int)(Math.Floor(grade)), feedString)));
}
