C#封裝繼承多態

1.

2.

3.多態

public abstract class animal//抽象類
{public abstract void eat();//抽象方法
}
public class cat : animal//繼承
{public override void eat()//重寫{messagebox.show("cat eat");}
}
public class dog: animal//繼承
{public override void eat()//重寫{messagebox.show("dog eat");}
}

4.重載

public class animal//抽象類
{public void eat(int a)//抽象方法{messagebox.show(a);}public void eat(int a,int b)//抽象方法{messagebox.show(a+b);}
}