public decimal calculate(Queue <string> polska, decimal x)
{
decimal answer = 0;
Stack <decimal> opers = new Stack <decimal>();
foreach (string s in polska)
{
if (standartOperators.Contains(s))
{
decimal a;
decimal b;
switch (s)
{
case "+":
opers.Push(opers.Pop() + opers.Pop());
break;
case "-":
b = opers.Pop();
a = opers.Pop();
opers.Push(a - b);
break;
case "*":
opers.Push(opers.Pop() * opers.Pop());
break;
case "/":
b = opers.Pop();
a = opers.Pop();
opers.Push(a / b);
break;
case "^":
b = opers.Pop();
a = opers.Pop();
opers.Push(DecimalMath.Pow(a, b));
break;
case "%":
b = opers.Pop();
a = opers.Pop();
opers.Push(a % b);
break;
case "sqrt":
opers.Push(DecimalMath.Sqrt(opers.Pop()));
break;
case "sin":
opers.Push(DecimalMath.Sin(opers.Pop()));
break;
case "cos":
opers.Push(DecimalMath.Cos(opers.Pop()));
break;
case "tan":
opers.Push(DecimalMath.Tan(opers.Pop()));
break;
case "atan":
opers.Push(DecimalMath.Atan(opers.Pop()));
break;
case "acos":
opers.Push(DecimalMath.Acos(opers.Pop()));
break;
case "asin":
opers.Push(DecimalMath.Asin(opers.Pop()));
break;
case "acotan":
opers.Push(DecimalMath.Atan(1 / opers.Pop()));
break;
case "exp":
opers.Push(DecimalMath.Exp(opers.Pop()));
break;
case "log":
opers.Push(DecimalMath.Log(opers.Pop()));
break;
case "ln":
opers.Push(DecimalMath.Log10(opers.Pop()));
break;
case "sinh":
opers.Push(DecimalMath.Sinh(opers.Pop()));
break;
case "cosh":
opers.Push(DecimalMath.Cosh(opers.Pop()));
break;
case "tanh":
opers.Push(DecimalMath.Tanh(opers.Pop()));
break;
case "abs":
opers.Push(DecimalMath.Abs(opers.Pop()));
break;
case "ceil":
opers.Push(DecimalMath.Ceiling(opers.Pop()));
break;
case "floor":
opers.Push(DecimalMath.Floor(opers.Pop()));
break;
case "fac":
opers.Push(factorial(opers.Pop()));
break;
case "sfac":
opers.Push(semifactorial(opers.Pop()));
break;
case "round":
opers.Push(DecimalMath.Round(opers.Pop()));
break;
case "fpart":
a = opers.Pop();
opers.Push(a - DecimalMath.Truncate(a));
break;
}
}
else if (s == "x")
{
opers.Push(x);
}
else
{
opers.Push(decimal.Parse(s));
}
}
answer = opers.Pop();
return(answer);
}