/// <summary>
/// Process one request.
/// Must be one of: '+', '-', '/', '*' or a number in a double format.
/// </summary>
/// <param name="request"></param>
public void ProcessSingleRequest(string request)
{
int size = data.GetSize();
switch (request)
{
case "+":
case "-":
case "*":
case "/":
if (size < 2)
{
ProcessError(request, 2);
return;
}
ProcessAction(request);
break;
case "_":
if (size == 0)
{
ProcessError(request, 1);
return;
}
data.RemoveElement();
break;
default:
double number = Double.Parse(request);
data.InsertElement(number);
break;
}
}
