public MainPage()
{
this.InitializeComponent();
this.NavigationCacheMode = NavigationCacheMode.Required;
calcEngine = new CalcEngine();
initialize();
}
public MainWindow()
{
InitializeComponent();
displayResult = new DisplayResult() { ResultText = "0" };
this.DataContext = displayResult;
calculatorEngine = new CalcEngine();
}
public MainWindow()
{
InitializeComponent();
engine = new CalcEngine();
clearflag = true;
}