private void calc_KeyUp(object sender, KeyEventArgs e)
{
Keys keyCode = e.KeyCode;
int keyValue = e.KeyValue;
if (keyCode >= Keys.D0 && keyCode <= Keys.D9)
{
calculator.addDisplayNumber((keyValue - ((int)Keys.D0)));
}
else if (keyCode >= Keys.NumPad0 && keyCode <= Keys.NumPad9)
{
calculator.addDisplayNumber((keyValue - ((int)Keys.NumPad0)));
}
else if (keyCode == Keys.Delete)
{
calculator.removeDisplays();
}
else if (keyCode == Keys.Back)
{
calculator.removeLastDisplayNumber();
}
else if (keyCode == Keys.Add)
{
calculator.addOperator((char)Calculator.Symbols.ADD);
}
else if (keyCode == Keys.Subtract)
{
calculator.addOperator((char)Calculator.Symbols.SUBSTRACT);
}
else if (keyCode == Keys.Multiply)
{
calculator.addOperator((char)Calculator.Symbols.MULTIPLY);
}
else if (keyCode == Keys.Divide)
{
calculator.addOperator((char)Calculator.Symbols.DIVIDE);
}
else if (keyCode == Keys.Decimal || keyCode == Keys.Oemcomma)
{
calculator.appendDisplayComma();
}
else if (keyCode == Keys.Return)
{
calculator.calculateResult();
}
printDisplays(calculator.getDisplays());
}