public StringWordContextDescription getStringWordContextBeforeIndex(string sentence, int endIndex)
{
StringWordContextDescription contextDescription = new StringWordContextDescription();
contextDescription.sentence = sentence;
contextDescription.tail = --endIndex;
contextDescription.head = endIndex;
contextDescription.context = "";
for (int i = endIndex; i >= 0; i--)
{
char c = sentence.ElementAt(i);
if (!isNumber(c) && c != '.' && c != '-')
{
break; // terminal character reached
}
contextDescription.head = i;
}
try
{
contextDescription.context = contextDescription.sentence.Substring(contextDescription.head, contextDescription.tail - contextDescription.head + 1);
}
catch (System.ArgumentOutOfRangeException e)
{
contextDescription.context = "ERROR";
}
return(contextDescription);
}
public StringWordContextDescription getStringWordContextAfterIndex(string sentence, int startIndex)
{
StringWordContextDescription contextDescription = new StringWordContextDescription();
contextDescription.sentence = sentence;
contextDescription.tail = ++startIndex;
contextDescription.head = startIndex;
contextDescription.context = ":";
for (int i = startIndex; i < sentence.Length; i++)
{
char c = sentence.ElementAt(i);
if (!isNumber(c) && c != '.' && c != '-')
{
break; // terminal character reached
}
contextDescription.tail = i;
}
try
{
contextDescription.context = contextDescription.sentence.Substring(contextDescription.head, contextDescription.tail - contextDescription.head + 1);
}
catch (System.ArgumentOutOfRangeException e)
{
contextDescription.context = "ERROR";
}
return(contextDescription);
}
public string solvePercentages(string contextProblem)
{
while (contextProblem.Contains("%"))
{
System.Diagnostics.Debug.WriteLine("Solving Percentages for : " + contextProblem);
StringWordContextDescription contextDescription = getStringWordContextBeforeIndex(contextProblem, contextProblem.IndexOf('%'));
contextProblem = replaceSubString(contextProblem, percent(contextDescription.context), contextDescription.head, contextDescription.tail + 1);
}
return(contextProblem);
}
public string solveMultiplications(string contextProblem)
{
while (contextProblem.Contains("*"))
{
System.Diagnostics.Debug.WriteLine("Solving Multiplication for : " + contextProblem);
StringWordContextDescription contextDescriptionA = getStringWordContextBeforeIndex(contextProblem, contextProblem.IndexOf('*') - 1);
StringWordContextDescription contextDescriptionB = getStringWordContextAfterIndex(contextProblem, contextProblem.IndexOf('*') + 1);
contextProblem = replaceSubString(contextProblem, mul(contextDescriptionA.context, contextDescriptionB.context), contextDescriptionA.head, contextDescriptionB.tail);
}
return(contextProblem);
}
public string solveSubtractions(string contextProblem)
{
while (contextProblem.Contains("—"))
{
System.Diagnostics.Debug.WriteLine("Solving Subtractions for : " + contextProblem);
StringWordContextDescription contextDescriptionA = getStringWordContextBeforeIndex(contextProblem, contextProblem.IndexOf('—') - 1);
StringWordContextDescription contextDescriptionB = getStringWordContextAfterIndex(contextProblem, contextProblem.IndexOf('—') + 1);
contextProblem = replaceSubString(contextProblem, sub(contextDescriptionA.context, contextDescriptionB.context), contextDescriptionA.head, contextDescriptionB.tail);
}
//return mul(contextDescriptionA.context, contextDescriptionA.context) + contextDescriptionA.head.ToString() + ":" + contextDescriptionA.tail.ToString() + " vs " + contextDescriptionB.head.ToString() + ":" + contextDescriptionB.tail.ToString();
return(contextProblem);
}