public string Evaluate(string input)
{
//string userName = Request.QueryString["username"];
Parser parser = new Parser();
decimal val = parser.Parse(input);
return val.ToString(val.ToString("G", CultureInfo.InvariantCulture));
}
public static void Main(string[] args)
{
Console.Write("input: ");
string input = Console.ReadLine();
Parser parser = new Parser();
decimal val = parser.Parse(input);
Console.Write("Eval: " + val.ToString("G", CultureInfo.InvariantCulture));
}