static void Main(string[] args)
{
TextPrinter textPrinter = new TextPrinter();
textPrinter.PrintNextPage("Introduction");
textPrinter.PrintNextPage("Contents");
ImagePrinter imagePrinter = new ImagePrinter();
imagePrinter.PrintNextPage(new byte[] { 40, 45, 6 });
Console.ReadLine();
}
public void Cast()
{
PrinterBase printer = new TextPrinter();
if (printer is TextPrinter)
{
((TextPrinter)printer).PrintNextPage();
TextPrinter textPrinter = (printer as TextPrinter);
textPrinter.PrintNextPage();
}
if (!(printer is TextPrinterWithExtendedHeading))
{
((TextPrinterWithExtendedHeading)printer).PrintNextPage();
TextPrinter textPrinter = (printer as TextPrinterWithExtendedHeading);
textPrinter.PrintNextPage();
}
}
static void Main(string[] args)
{
TextPrinter textPrinter = new TextPrinter("Jungle book", new[] { "Introduction", "Contents" });
textPrinter.PrintNextPage();
textPrinter.PrintNextPage();
ImagePrinter imagePrinter = new ImagePrinter("Jungle book", new byte[][] { new byte[] { 40, 45, 6 } });
imagePrinter.PrintNextPage();
TextPrinterWithExtendedHeading textPrinterWithExtendedHeading = new TextPrinterWithExtendedHeading("Jungle book", new[] { "Introduction", "Contents" });
textPrinterWithExtendedHeading.PrintNextPage();
//polymorphism
PrinterBase printerA = new TextPrinter("Jungle book", new[] { "Introduction", "Contents" });
PrinterBase printerB = new ImagePrinter("Jungle book", new byte[][] { new byte[] { 40, 45, 6 } });
printerB.PrintNextPage();
printerA.PrintNextPage();
//
Console.ReadLine();
}
