static void Main(string[] args)
{
// print out some statement explaining this section
// separate it into a region?
Console.WriteLine("====== DEMO OF USING ABSTRACT METHODS ======\n");
// create a dog object and tell it to sleep, eat, and exercise
Console.WriteLine("DOG:");
Dogs dog1 = new Dogs();
Console.WriteLine(dog1.Eat());
Console.WriteLine(dog1.Sleep());
// create a mammal object and tell it to sleep, eat, and exercise
Console.WriteLine("\nMAMMAL:");
Mammals mammal1 = new Mammals();
Console.WriteLine(mammal1.Eat());
Console.WriteLine(mammal1.Sleep());
Console.WriteLine("\n============================================");
}