private void equalClick(object sender, EventArgs e)
{
if (inputTextBox.Text.Length > 1 && areBracketsClosed())
{
if (currentNumber != "")
{
if (elements.Count == 0)
{
return;
}
elements.Add(currentNumber);
currentNumber = "";
isNumberLast = false;
result = Convert.ToString(ONP.Calculate(elements));
elements.Clear();
if (inputTextBox.Text.Length + result.Length > 22)
{
inputTextBox.Text = "=" + result;
}
else
{
inputTextBox.Text += "=" + result;
}
}
else if (elements.Count > 0 && elements.Last() == ")")
{
result = Convert.ToString(ONP.Calculate(elements));
elements.Clear();
isNumberLast = false;
if (inputTextBox.Text.Length + result.Length > 22)
{
inputTextBox.Text = "=" + result;
}
else
{
inputTextBox.Text += "=" + result;
}
}
}
}
private void operatorClick(object sender, EventArgs e)
{
if (inputTextBox.Text.Length > 22)
{
return;
}
string text = ((Button)sender).Text;
if (!isNumberLast)
{
if (text == "(")
{
if (elements.Count > 0 && (ONP.isOperator(elements.Last()) || elements.Last() == "("))
{
if (inputTextBox.Text.LastChar() == ",")
{
return;
}
inputTextBox.Text += "(";
elements.Add(text);
}
else if (inputTextBox.Text == "0")
{
inputTextBox.Text = "(";
elements.Add(text);
}
}
else if (inputTextBox.Text == "0")
{
if (text == "-")
{
elements.Add(text);
inputTextBox.Text = text;
}
}
else if (inputTextBox.Text.Contains("="))
{
elements.Add(result);
elements.Add(text);
inputTextBox.Text = result + text;
result = "";
}
else if (ONP.isOperator(text))
{
if (inputTextBox.Text.Length > 0 && elements.Last() == ")")
{
elements.Add(text);
inputTextBox.Text += text;
}
else
{
if (inputTextBox.Text.Length > 1 && elements.Last() == "(")
{
return;
}
else
{
elements.RemoveLast();
elements.Add(text);
inputTextBox.Text = inputTextBox.Text.RemoveLastChar();
inputTextBox.Text += text;
}
}
}
else if (text == ")" && isBracketNeeded())
{
elements.Add(text);
inputTextBox.Text += text;
}
}
else
{
if (ONP.isOperator(text) || (text == ")" && isBracketNeeded()))
{
elements.Add(currentNumber);
currentNumber = "";
isNumberLast = false;
elements.Add(text);
inputTextBox.Text += text;
}
}
MRclicked = false;
}
private bool isANumber(string s)
{
return(!(ONP.isOperator(s) || s == "(" || s == ")"));
}