public static string RunEstimate()
{
ArrayList Stack = CreateStack();
Stack <int> tmp = new Stack <int>();
int n;
foreach (string s in Stack)
{
if (int.TryParse(s, out n))
{
tmp.Push(n);
}
else
{
switch (s)
{
case "*":
{
tmp.Push(MathOperations.Mult(tmp.Pop(), tmp.Pop()));
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
case "/":
{
n = tmp.Pop();
tmp.Push(MathOperations.Div(tmp.Pop(), n));
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
case "%":
{
n = tmp.Pop();
tmp.Push(MathOperations.Mod(tmp.Pop(), n));
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
case "+":
{
tmp.Push(MathOperations.Add(tmp.Pop(), tmp.Pop()));
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
case "-":
{
n = tmp.Pop();
if (tmp.Count == 0)
{
tmp.Push(MathOperations.IABS(n));
}
else
{
tmp.Push(MathOperations.Sub(tmp.Pop(), n));
}
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
case "m":
{
tmp.Push(MathOperations.IABS(tmp.Pop()));
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
case "p":
{
tmp.Push(MathOperations.ABS(tmp.Pop()));
if (MathOperations.lastError.Length > 0)
{
ShowMessage = true;
Expression = MathOperations.lastError;
return(Expression);
}
break;
}
default:
{
ShowMessage = true;
Expression = "Error in calculating";
return(Expression);
}
}
}
}
return(tmp.Pop().ToString());
}
