ID：9110-26918 写出下列程序的运行结果
class Animal{
public void Speak(){
System.out.println("Animal speak ...");
}
}
class Dog extends Animal{
public void Speak(){
System.out.println("Bowwow ...");
}
}
class Cat extends Animal{
public void Speak(){
System.out.println("Meow ...");
}
}
public class Ex3{
public static void MakeSpeak(Animal an){
an.Speak();
}
public static void main(String []args){
Cat c=new Cat();
Dog d=new Dog();
MakeSpeak(c);
MakeSpeak(d);
}
}
