private void GetPostfix()
{
foreach (string character in Function)
{
if (!Operations.Contains(character))
{
PostFix.Enqueue(character == "x" ? character : double.Parse(character));
}
if (character is "(")
{
Stack.Push(character);
}
else if (character is ")")
{
while (Stack.Count != 0)
{
if (Stack.Peek() == "(")
{
Stack.Pop();
break;
}
else
{
PostFix.Enqueue(Stack.Pop());
}
}
}
if (IsOperator(character))
{
if (Stack.Count == 0)
{
Stack.Push(character);
}
else
{
if (GetPrior(character) > GetPrior(Stack.Peek()))
{
Stack.Push(character);
}
else if ((GetPrior(character) == GetPrior(Stack.Peek())) && (character == "^"))
{
Stack.Push(character);
}
else
{
while ((Stack.Count != 0) && (GetPrior(character) <= GetPrior(Stack.Peek())))
{
PostFix.Enqueue(Stack.Pop());
}
Stack.Push(character);
}
}
}
}
while (Stack.Count != 0)
{
PostFix.Enqueue(Stack.Pop());
}
}