{}
// hierarchical inheritence
class Main {
public static void main(String[] args)
{
Dog d = new Dog();
Cat c = new Cat();
d.sound();
d.bark();
c.sound();
c.meow();
}
}
class Animal {
void sound() {
System.out.println("Animal makes sound");
}
}
class Dog extends Animal {
void bark() {
System.out.println("Dog barks");
}
}
class Cat extends Animal {
void meow() {
System.out.println("Cat meows");
}
}