public decimal result(string input)
{
input = correction(input);
input = toUnarMinus(input);
List<string> operators = new List<string>(standart_operators);
Stack<string> stack = new Stack<string>();
Queue<string> queue = new Queue<string>(ConvertToPostfixNotation(input));
string str = queue.Dequeue();
while (queue.Count >= 0)
{
if (!operators.Contains(str))
{
try
{
stack.Push(str);
str = queue.Dequeue();
}
catch
{
stack.Clear();
stack.Push("Unparsable");
break;
}
}
else
{
decimal summ = 0;
switch (str)
{
case "+":
{
try
{
decimal a = Convert.ToDecimal(stack.Pop());
decimal b = Convert.ToDecimal(stack.Pop());
summ = a + b;
break;
}
catch
{
return Convert.ToDecimal("asdasd");
break; }
}
case "-":
{
try
{
decimal a = Convert.ToDecimal(stack.Pop());
decimal b = Convert.ToDecimal(stack.Pop());
summ = b - a;
break;
}
catch
{
return Convert.ToDecimal("asdasd");
break; }
}
case "*":
{
try
{
decimal a = Convert.ToDecimal(stack.Pop());
decimal b = Convert.ToDecimal(stack.Pop());
summ = a * b;
break;
}
catch
{
return Convert.ToDecimal("asdasd");
break; }
}
case "/":
{
try
{
decimal a = Convert.ToDecimal(stack.Pop());
decimal b = Convert.ToDecimal(stack.Pop());
summ = b / a;
break;
}
catch {
return Convert.ToDecimal("asdasd");
break; }
}
case "^":
{
try
{
decimal a = Convert.ToDecimal(stack.Pop());
decimal b = Convert.ToDecimal(stack.Pop());
summ = Convert.ToDecimal(Math.Pow(Convert.ToDouble(b), Convert.ToDouble(a)));
break;
}
catch
{
return Convert.ToDecimal("asdasd");
break; }
}
case "@":
{
try
{
decimal a = Convert.ToDecimal(stack.Pop());
summ = -a;
break;
}
catch {
break;
}
}
}
stack.Push(summ.ToString());
if (queue.Count > 0)
str = queue.Dequeue();
else
break;
}
}
if (stack.ToArray().Length > 1)
{
string s = "sasdasd";
decimal b = Convert.ToDecimal(s);
return b;
}
else
{
return Convert.ToDecimal(stack.Pop());
}
}