public string Evaluate()
{
//if (eval != "") return eval;
if (POSTstr.Contains("Error"))
{
return("Error");
}
if (POSTstr == "")
{
if (INstr != "")
{
POSTstr = InToPost();
}
else if (PREstr != "")
{
POSTstr = PreToPost();
}
else
{
return("Error");
}
}
eval = evaPost();
return(eval);
}
private string Po2I()
{
if (POSTstr.Contains("Error") || POSTstr == "")
{
return("Error");
}
string result = "", right = "", left = "";
myStack = new Stack(POSTstr.Length);
for (var pivot = 0; pivot < POSTstr.Length; pivot++)
{
if (isOperator(POSTstr[pivot]))
{
right = myStack.pop();
left = myStack.pop();
myStack.push("(" + left + POSTstr[pivot] + right + ")");
}
else if (POSTstr[pivot] == ',')
{
var newstr = "";
var ch = ' ';
while (true)
{
if (pivot < POSTstr.Length)
{
pivot++;
}
ch = POSTstr[pivot];
if (ch == ',')
{
break;
}
newstr += ch;
}
myStack.push(newstr);
}
else if (POSTstr[pivot] != ' ')
{
myStack.push(POSTstr[pivot].ToString());
}
}
result += myStack.pop();
return(result);
}
public string Evaluate()
{
//if (eval != "") return eval;
if (POSTstr.Contains("Error"))
{
return("Error");
}
if (POSTstr == "")
{
if (INstr != "")
{
POSTstr = GetPostfix();
}
else
{
return("Error");
}
}
eval = EvaPost();
return(eval);
}
