public static double PerformCalculation(List <string> postfixExpression)
{
Heap <double> calcHeap = new Heap <double>();
try
{
foreach (string elem in postfixExpression)
{
if (ExpressionManaging.IsMathOperator(elem))
{
double secondOperand = calcHeap.Pop();
double firstOperand = calcHeap.Pop();
double result;
switch (elem)
{
case "+":
result = firstOperand + secondOperand;
break;
case "-":
result = firstOperand - secondOperand;
break;
case "*":
result = firstOperand * secondOperand;
break;
case "/":
result = firstOperand / secondOperand;
break;
case "^":
result = Math.Pow(firstOperand, secondOperand);
break;
default:
throw new ArgumentException("Wrong operator readed");
}
calcHeap.Push(result);
}
else
{
calcHeap.Push(Convert.ToDouble(elem));
}
}
}
catch (ArgumentException e)
{
Console.WriteLine(e.Message);
throw;
}
try
{
if (calcHeap.Amount != 1)
{
throw new ApplicationException("Wrong output data in method!");
}
else
{
return(calcHeap.Pop());
}
}
catch
{
throw;
}
}
