/// <summary>
/// Creates a new analytic function object on the basis
/// of function string like "f(x) = 5x"
/// </summary>
/// <param name="functionString"></param>
public AnalyticFunction(string functionString)
{
string beta = functionString; // временная
char arg; // символ аргумента
arg = CheckNPrepare(ref beta);
this.actions = AnalyticFunction.Analyze(beta, arg, 0);
this.argument = arg;
this.functionString = functionString;
}
static void Main(string[] args)
{
if (args.Length == 0 || string.IsNullOrWhiteSpace(string.Concat(args)))
{
Console.WriteLine();
Console.WriteLine("Syntax: whitecalc \"[function] [<< argumentValue]\".");
Console.WriteLine();
Console.WriteLine("Parameter description:");
Console.WriteLine();
Console.WriteLine("\t[function] - a required argument. Either a function of 'x' (i.e. '2sin(x) + 6') or an expression (i.e. '63^2 + cos(25)').");
Console.WriteLine("\t[<< argumentValue] - an optional parameter specifying the value of 'x'. If not specified, x will be assumed equal to 0.");
Console.WriteLine();
Console.WriteLine("The result of the evaluation will be copied to the clipboard.");
Console.WriteLine();
Console.WriteLine("Please note the usage of the double quotes.");
Console.WriteLine("Also note that the 'argumentValue' MUST be preceded by an '<<'.");
Console.WriteLine();
Console.WriteLine("Example call and output: ");
Console.WriteLine();
Console.WriteLine("whitecalc 2x^2 + 5sin(x) + 6 << 8");
Console.WriteLine("--| x = 8 |-| res = 138.946791233117 |--");
Console.WriteLine("--| 'res' copied to clipboard |--");
return;
}
string arg = string.Concat(args).Replace(" ", "");
int indexOfArgumentArea = arg.IndexOf("<<");
double argumentValue = 0;
if (indexOfArgumentArea != arg.LastIndexOf("<<"))
{
Console.WriteLine("ERROR: The incoming string contained several '<<' symbols");
return;
}
if (indexOfArgumentArea >= 0 && !double.TryParse(arg.Substring(indexOfArgumentArea + 2), out argumentValue))
{
Console.WriteLine("ERROR: Could not parse the argument value into a number.");
return;
}
if (indexOfArgumentArea >= 0)
arg = whiteMath.General.OtherExtensions.SubstringToIndex(arg, 0, indexOfArgumentArea);
AnalyticFunction fun = null;
try
{
fun = new AnalyticFunction("f(x)=" + arg);
double functionValue = fun[argumentValue];
Console.WriteLine("--| x = {0} |-| res = {1} |--", argumentValue, functionValue);
System.Windows.Forms.Clipboard.SetText(functionValue.ToString());
Console.WriteLine("--| 'res' copied to clipboard |--");
}
catch (Exception exception)
{
Console.WriteLine(string.Format("ERROR: Could not calculate the value of {0}: {1}", "f(x)=" + arg, exception.Message));
}
return;
}
