private void Calculate()
{
if (Op == "+")
{
CurrentNum = PreviousNum + double.Parse(TotalTextBox.Text);
PreviousNum = CurrentNum;
TotalTextBox.Text = Math.Round(CurrentNum, DecimalPlaces).ToString();
OperatorTextBox.Clear();
OperatorTextBox.Visibility = Visibility.Hidden;
HaveOp = false;
Op = "";
}
if (Op == "-")
{
CurrentNum = PreviousNum - double.Parse(TotalTextBox.Text);
PreviousNum = CurrentNum;
TotalTextBox.Text = Math.Round(CurrentNum, DecimalPlaces).ToString();
OperatorTextBox.Clear();
OperatorTextBox.Visibility = Visibility.Hidden;
HaveOp = false;
Op = "";
}
if (Op == "x")
{
CurrentNum = PreviousNum * double.Parse(TotalTextBox.Text);
PreviousNum = CurrentNum;
TotalTextBox.Text = Math.Round(CurrentNum, DecimalPlaces).ToString();
OperatorTextBox.Clear();
OperatorTextBox.Visibility = Visibility.Hidden;
HaveOp = false;
Op = "";
}
if (Op == "÷")
{
CurrentNum = PreviousNum / double.Parse(TotalTextBox.Text);
PreviousNum = CurrentNum;
TotalTextBox.Text = Math.Round(CurrentNum, DecimalPlaces).ToString();
OperatorTextBox.Clear();
OperatorTextBox.Visibility = Visibility.Hidden;
HaveOp = false;
Op = "";
}
if (Op == "^")
{
CurrentNum = Math.Pow(PreviousNum, double.Parse(TotalTextBox.Text));
PreviousNum = CurrentNum;
TotalTextBox.Text = Math.Round(CurrentNum, DecimalPlaces).ToString();
OperatorTextBox.Clear();
OperatorTextBox.Visibility = Visibility.Hidden;
HaveOp = false;
Op = "";
}
}
private void ButtonClear_Click(object sender, RoutedEventArgs e)
{
TotalTextBox.Text = "0";
Op = "";
HaveOp = false;
OperatorTextBox.Clear();
PreviewTextBox.Clear();
PreviousNum = 0;
CurrentNum = 0;
OperatorTextBox.Visibility = Visibility.Hidden;
PreviewTextBox.Visibility = Visibility.Hidden;
InvalidTextBox.Visibility = Visibility.Hidden;
}
