public Double calculate()
{
Double x1 = 0;
if (leftNode != null)
{
x1 = leftNode.calculate();
}
Double x2 = 0;
if (rightNode != null)
{
x2 = rightNode.calculate();
}
switch (value)
{
case "+":
calculatedValue = x1 + x2;
return(calculatedValue);
case "-":
calculatedValue = x1 - x2;
return(calculatedValue);
case "*":
calculatedValue = x1 * x2;
return(calculatedValue);
case "/":
if (x2 == 0)
{
throw new Exception("Zero Division");
}
calculatedValue = x1 / x2;
return(calculatedValue);
}
calculatedValue = double11ToDouble(value);
return(calculatedValue);
}
private void Button_Click(object sender, EventArgs e)
{
if (update)
{
taskTextBox.Text = "";
resultTextBox.Text = "";
update = false;
}
switch (((Button)sender).Name)
{
case "clearButton":
taskTextBox.Text = "";
resultTextBox.Text = "";
break;
case "deleteButton":
if (taskTextBox.Text.Length > 0)
{
taskTextBox.Text = taskTextBox.Text.Remove(taskTextBox.Text.Length - 1);
}
break;
case "buttonNumber0":
taskTextBox.Text += "0";
break;
case "buttonNumber1":
taskTextBox.Text += "1";
break;
case "buttonNumber2":
taskTextBox.Text += "2";
break;
case "buttonNumber3":
taskTextBox.Text += "3";
break;
case "buttonNumber4":
taskTextBox.Text += "4";
break;
case "buttonNumber5":
taskTextBox.Text += "5";
break;
case "buttonNumber6":
taskTextBox.Text += "6";
break;
case "buttonNumber7":
taskTextBox.Text += "7";
break;
case "buttonNumber8":
taskTextBox.Text += "8";
break;
case "buttonNumber9":
taskTextBox.Text += "9";
break;
case "buttonNumberA":
taskTextBox.Text += "A";
break;
case "leftBracketButton":
taskTextBox.Text += "(";
break;
case "rightBracketButton":
taskTextBox.Text += ")";
break;
case "multiplicationButton":
taskTextBox.Text += "*";
break;
case "divisionButton":
taskTextBox.Text += "/";
break;
case "additionButton":
taskTextBox.Text += "+";
break;
case "subtractionButton":
taskTextBox.Text += "-";
break;
case "dotButton":
taskTextBox.Text += ".";
break;
case "resultButton":
try
{
CalculateTree calc = new CalculateTree(taskTextBox.Text);
calc.calculate();
resultTextBox.Text = calc.getResult();
} catch (Exception exep)
{
resultTextBox.Text = exep.Message;
}
update = true;
break;
}
}