public PostFix SetVariable(string variable, string number)
{
int length = _input.Length;
for (int i = 0; i < length; i++)
{
RPN.Token token = _input[i];
if (token.Type == RPN.Type.Variable && token.Value == variable)
{
_input[i] = new RPN.Token(number, 0, RPN.Type.Number);
}
}
return(this);
}
public double Compute(RPN.Token[] input)
{
_stopwatch.Start();
for (int i = 0; i < input.Length; i++)
{
RPN.Token token = input[i];
switch (token.Type)
{
case RPN.Type.Number:
_stack.Push(double.Parse(token.Value));
break;
case RPN.Type.Variable:
_variables.Push(token);
break;
case RPN.Type.Operator:
{
Operator Operator = _dataStore.Operators[token.Value];
double[] arguments = GetArguments(token.Arguments);
double ans = Operator.Compute(arguments);
_stack.Push(ans);
break;
}
case RPN.Type.Function:
{
//Looks up the function in the Dict
Function function = _dataStore.Functions[token.Value];
double[] arguments = GetArguments(token.Arguments);
double ans = function.Compute(arguments);
_stack.Push(ans);
break;
}
default:
throw new NotImplementedException(token + " " + token.ToString().Length);
}
}
_stopwatch.Stop();
_dataStore.AddTimeRecord("Evaluation", _stopwatch);
if (_dataStore.DebugMode)
{
Write(_dataStore.TimeRecords().ToString());
Write($"Frequency: {Stopwatch.Frequency}");
Write("");
}
if (_stack.Count != 1)
{
return(double.NaN);
}
if (_dataStore.Format.ContainsKey(_stack.Peek()))
{
Write($"The answer may also be written in the following manner: {_dataStore.Format[_stack.Peek()]}");
}
return(_stack.Pop());
}
