static void Main(string[] args)
{
Cat cat = new Cat();
Dog dog = new Dog();
Monkey monkey = new Monkey();
Speak speak = new Speak();
Eat eat = new Eat();
cat.Accept(speak);
cat.Accept(eat);
dog.Accept(speak);
dog.Accept(eat);
Console.ReadLine();
}
static void Main(string[] args)
{
Dog dog = new Dog();
Cat cat = new Cat();
Lion lion = new Lion();
Speak speak = new Speak();
dog.Accept(speak);
cat.Accept(speak);
lion.Accept(speak);
Eat eat = new Eat();
dog.Accept(eat);
cat.Accept(eat);
lion.Accept(eat);
Console.ReadLine();
}