private string getLastTokenValue(string updatedInput)
{
Tokenize inputTokenize = new Tokenize(updatedInput);
Token[] tokens = inputTokenize.getArrayOfTokens();
Token lastItem = tokens[tokens.Length - 1];
return(lastItem.getTokenValue().ToString());
}
public string getResult(string updatedInput)
{
Tokenize inputTokenize = new Tokenize(updatedInput);
Token[] tokens = inputTokenize.getArrayOfTokens();
string answer;
if (tokens.Length == 0 || InputValidation.countLeftBrackets(updatedInput) != InputValidation.countRightBrackets(updatedInput))
{
answer = "";
}
else
{
ShuntingYard sy = new ShuntingYard(tokens);
CalculateExpression calculate = new CalculateExpression(sy.getArray());
answer = calculate.getAnswer().ToString();
}
return(answer);
}
public string changeTheSign(string updatedExpression)
{
if (String.IsNullOrEmpty(updatedExpression))
{
updatedExpression = "(-";
}
else
{
Tokenize inputTokenize = new Tokenize(updatedExpression);
Token[] tokens = inputTokenize.getArrayOfTokens();
string lastDecimalToken = Regex.Match(updatedExpression, @"(\d+\.\d+)$").Value;
if (!string.IsNullOrEmpty(lastDecimalToken))
{
updatedExpression = checkSignOfDecimalToken(tokens, updatedExpression, lastDecimalToken.Length);
}
else
{
updatedExpression = checkSign(tokens, updatedExpression);
}
}
expressionText = updatedExpression;
return(expressionText);
}