Zoo.java

public class Zoo {

	public static void main(String[] args) {
		
		Dog Fido = new Dog(8);
		Dog Spark = new Dog();
		Fido.speak();
		Spark.speak();
		System.out.println("Fido's age is : " + Fido.age);
		System.out.println("Spark's age is : " + Spark.age);
		
		Duck Daffy = new Duck(10);
		System.out.print("Daffy says hi or should I say: ");
		Daffy.speak();
		System.out.println("Daffy's age is : " + Daffy.age);
		System.out.println("Daffy swims at " + Daffy.nauticalspeed + " knots.");
		System.out.println("Daffy flies at " + Daffy.flightspeed + " knots.");
		
		
		Human Shijit = new Human();
		System.out.println("Shijit's Birthdate is" + Shijit.getDateofBirth());
		System.out.println("Shijit's SSN is" + Shijit.getSSN());
	}

}