private void BtnEquals_Click(object sender, RoutedEventArgs e)
{
if (lastNumber != 0)
{
if (newNumber == 0)
{
newNumber = Convert.ToDouble(lblResult.Content.ToString());
}
switch (selectedOperator)
{
case SelectedOperator.Multiplication:
lblResult.Content = SimpleMath.Multiplicate(lastNumber, newNumber);
break;
case SelectedOperator.Substraction:
lblResult.Content = SimpleMath.Sustract(lastNumber, newNumber);
break;
case SelectedOperator.Addition:
lblResult.Content = SimpleMath.Add(lastNumber, newNumber);
break;
case SelectedOperator.Division:
lblResult.Content = SimpleMath.Divide(lastNumber, newNumber);
break;
}
lastNumber = Convert.ToDouble(lblResult.Content.ToString());
newNumber = 0;
}
}