//deals with button inputs and sorts out the display accordingly
public void DigitButtonPress(DigitButtonType buttonType)
{
calculatorManager.AppendDigit(buttonType.ToStringRepresentation());
Display = calculatorManager.Display;
}
private bool CanDigitButtonPress(DigitButtonType buttonType)
{
return(calculatorManager.IsValidDigit(buttonType.ToStringRepresentation()));
}