tom喵八卦

class Animal {

public void sound(){}

}

class Dog extends Animal{

public void sound(){

System.out.print("汪汪");

}

}

class Cat extends Animal{

public void sound(){

System.out.print("喵喵");

}

}

public class Test{

public static void main(String[] args) {

Animal c = new Cat();

Animal d = new Dog();

System.out.print("tom");

c.sound();

System.out.print("旺财");

d.sound();

}

}