private double Calculate(IEnumerable <ContentElement> input)
{
Stack <ContentElement> stack = new Stack <ContentElement>();
Queue <ContentElement> queue = new Queue <ContentElement>(ConvertToPostfixNotation(input));
ContentElement firstInQuene = queue.Dequeue();
double returnValue = 0;
double summ;
if (queue.Count == 0)
{
if (firstInQuene.IsIndex())
{
returnValue = DigitValue(new CellIndex(firstInQuene.Text()));
}
else
{
returnValue = firstInQuene.Value();
}
}
else
{
while (queue.Count >= 0)
{
if (!firstInQuene.IsOperators())
{
stack.Push(firstInQuene);
firstInQuene = queue.Dequeue();
}
else
{
ContentElement firstEl = stack.Pop();
ContentElement secondEl = stack.Pop();
summ = MathOp(firstEl, secondEl, firstInQuene);
stack.Push(new DigitElement(summ.ToString()));
if (queue.Count > 0)
{
firstInQuene = queue.Dequeue();
}
else
{
break;
}
}
}
returnValue = stack.Pop().Value();
}
return(returnValue);
}
private double MathOp(ContentElement firstDigit, ContentElement secondDigit, ContentElement operation)
{
double summ = 0;
double firstDigitEl;
double secondDigitEl;
if (firstDigit.IsIndex())
{
firstDigitEl = DigitValue(new CellIndex(firstDigit.Text()));
}
else
{
firstDigitEl = firstDigit.Value();
}
if (secondDigit.IsIndex())
{
secondDigitEl = DigitValue(new CellIndex(secondDigit.Text()));
}
else
{
secondDigitEl = secondDigit.Value();
}
try
{
switch (operation.Text())
{
case "+":
{
summ = firstDigitEl + secondDigitEl;
break;
}
case "-":
{
summ = secondDigitEl - firstDigitEl;
break;
}
case "*":
{
summ = secondDigitEl * firstDigitEl;
break;
}
case "/":
{
summ = secondDigitEl / firstDigitEl;
break;
}
case "^":
{
summ = Math.Pow(secondDigitEl, firstDigitEl);
break;
}
}
}
catch (Exception ex)
{
Console.WriteLine("Ошибка: " + ex.Message + " Математическая опперация не выполнилась!");
}
return(summ);
}