static void Main(string[] args)
{
Console.WriteLine("Welcome to the Zoo!");
Cow cow = new Cow();
BlackBear blackbear = new BlackBear();
PolarBear polarBear = new PolarBear();
Ostrich ostrich = new Ostrich();
Goose goose = new Goose();
Tortise tortise = new Tortise();
Crocodile crocodile = new Crocodile();
Console.WriteLine($"Cow: {cow.PlowField()}");
Console.WriteLine($"Black Bear: {blackbear.ClimbTree()}");
Console.WriteLine($"Polar Bear: {polarBear.Sleep()}");
Console.WriteLine($"Polar Bear: {polarBear.Prey}");
Console.WriteLine($"Polar Bear: {polarBear.HuntingGround()}");
Console.WriteLine($"Ostrich: {ostrich.Sprint()}");
Console.WriteLine($"Ostrich: {ostrich.Race()}");
Console.WriteLine($"Ostrich: When I race, do I wear blinders? {ostrich.WearBlinders}");
Console.WriteLine($"Goose: {goose.Sound()}");
Console.WriteLine($"Tortise: {tortise.HideInShell()}");
Console.WriteLine($"Crocodile: {crocodile.BirdTeethClean()}");
}
public void GooseCanInheritSound()
{
Goose goose = new Goose();
Assert.Equal("Quack! Quack! Quack!", goose.Sound());
}