private void btnPoint_Click(object sender, RoutedEventArgs e) { if (Result_txt.Text == "Enter Equation" || Result_txt.Text == "UNDEFINED") { Result_txt.Text = "."; } else { Result_txt.AppendText("."); } }
private void btnMod_Click(object sender, RoutedEventArgs e) { if (operation != "") { MessageBox.Show("Operator already present"); } if (Result_txt.Text == "Enter Equation" && operation == "") { Result_txt.Text = "%"; operation = "%"; } if (operation == "" && Result_txt.Text != "UNDEFINED") { Result_txt.AppendText("%"); operation = "%"; } }