private void preAppendX()
{
if (textBoxCalcInput.Text.CompareTo("") == 0)
{
return;
}
if (MathProcessor.isOperand(textBoxCalcInput.Text.Last().ToString()))
{
textBoxCalcInput.Text += "x";
}
}
private void btnAns_Click(object sender, RoutedEventArgs e)
{
foreach (char c in textUserData.Text)
{
if (!MathProcessor.isOperand(c.ToString()))
{
return;
}
}
textBoxCalcInput.Text += textUserData.Text;
}
/// <summary>
/// Decomposes the input string into it's components for an infix expression
/// </summary>
/// <param name="expression">Mathematical expression in string format</param>
/// <returns></returns>
private Queue <string> decomposeString(string expression)
{
Queue <string> infix = new Queue <string>();
string trimmed = textBoxCalcInput.Text.Trim();
trimmed = trimmed.ToLower();
char[] chars = trimmed.ToCharArray();
bool negative = false;
int i = 0;
while (i < chars.Length)
{
if (Char.IsWhiteSpace(chars[i]))
{
i++;
continue;
}
if (MathProcessor.isOperand(chars[i].ToString()))
{
string number = "";
while (MathProcessor.isOperand(chars[i].ToString()))
{
number += chars[i].ToString();
i++;
if (i >= chars.Length)
{
break;
}
}
if (number.CompareTo(".") == 0)
{
throw new Exception(number + " is not a valid number");
}
number = ((negative) ? "-" : "") + number;
infix.Enqueue(number);
negative = false;
}
else
{
switch (chars[i].ToString())
{
case "s":
infix.Enqueue("sin");
infix.Enqueue("(");
i += 4;
break;
case "c":
try
{
if (MathProcessor.isOperand(chars[i + 1].ToString()))
{
infix.Enqueue("C");
i++;
}
else
{
infix.Enqueue("cos");
infix.Enqueue("(");
i += 4;
}
break;
}
catch (IndexOutOfRangeException e)
{
throw new Exception("Syntax Error" + e.Message);
}
case "t":
infix.Enqueue("tan");
infix.Enqueue("(");
i += 4;
break;
case "a":
try
{
switch (chars[i + 1].ToString())
{
case "s":
infix.Enqueue("asin");
infix.Enqueue("(");
i += 5;
break;
case "c":
infix.Enqueue("acos");
infix.Enqueue("(");
i += 5;
break;
case "t":
infix.Enqueue("atan");
infix.Enqueue("(");
i += 5;
break;
default:
throw new Exception("Unknown Operation");
}
break;
}
catch (IndexOutOfRangeException e)
{
throw new Exception("Syntax Error" + e.Message);
}
case "p":
infix.Enqueue("P");
i++;
break;
case "e":
infix.Enqueue("exp");
infix.Enqueue("(");
i += 4;
break;
case "l":
try
{
if (chars[i + 1].ToString().CompareTo("o") == 0)
{
infix.Enqueue("log");
i += 4;
}
else
{
infix.Enqueue("ln");
i += 3;
}
infix.Enqueue("(");
break;
}
catch (IndexOutOfRangeException e)
{
throw new Exception("Syntax Error" + e.Message);
}
case MathProcessor.SUPERSCRIPTN:
infix.Enqueue("rt");
infix.Enqueue("(");
i += 3;
break;
case MathProcessor.SQUAREROOT:
case MathProcessor.CUBEROOT:
case "^":
infix.Enqueue(chars[i].ToString());
infix.Enqueue("(");
i += 2;
break;
case MathProcessor.SQUARED:
infix.Enqueue("^");
infix.Enqueue("(");
infix.Enqueue("2");
infix.Enqueue(")");
i++;
break;
case MathProcessor.CUBED:
infix.Enqueue("^");
infix.Enqueue("(");
infix.Enqueue("3");
infix.Enqueue(")");
i++;
break;
case "x":
case "/":
case "(":
case ")":
infix.Enqueue(chars[i].ToString());
i++;
break;
case "-":
if (infix.Count == 0)
{
negative = true;
i++;
break;
}
try
{
Double.Parse(infix.Last());
infix.Enqueue(chars[i].ToString());
i++;
negative = false;
}
catch (FormatException)
{
i++;
negative = true;
}
break;
case "+":
if (infix.Count == 0)
{
i++;
break;
}
try
{
Double.Parse(infix.Last());
infix.Enqueue(chars[i].ToString());
i++;
}
catch (FormatException)
{
i++;
}
break;
case MathProcessor.PI:
infix.Enqueue(Math.PI.ToString());
i++;
break;
default: throw new Exception("Currently Unsupported");
}
}
}
return(infix);
}
