public void PrintAvailableItems()
{
Console.WriteLine("Items that can be checked out: ");
for (int i = 0; i < Checkouts.Count; i++)
{
ICheckoutable item = Checkouts[i];
if (item is Book)
{
Book book = (Book)item;//explicit type casting (force after checking w/ is)
Console.WriteLine($"{i + 1}. Type={book.PubType}: {book.Title} -- {book.Author} ");
}
Magazine newMag = item as Magazine;//implicit type casting, try and check for null
if (newMag != null)
{
Console.WriteLine($"{i + 1}. Type={newMag.PubType}: {newMag.Title} -- {newMag.Volume} ");
}
}
}//end of printavailabeitems
//helper methods
public void AddMag(Magazine newMag)
{
Magazines.Add(newMag);
}