package test.xing;

class Father{
    protected int age;
    public Father(){
        age = 40;
    }
    
    void eat(){
        System.out.println("父親在吃飯");
    }
}
class Child extends Father{
    protected int age;
    public Child(){
        age = 18;
    }
    
    void eat(){
        System.out.println(
 
"孩子在吃飯");
    }
    void play(){
        System.out.println("孩子在打CS");
    }
}

public class TestPolymorphic {
    public static void main(String[] args) {
        Father c = new Child();
        c.eat();
        //c.play();
        System.out.println("年齡："+c.age );
        
    }

}