C#Protected和多态(虚方法)
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2022-06-14 20:09:46
Protected 在基类中定义后,能被派生类调用,但是不能被其他类调用。 virtual 在基类中定义后,在派生类中能被重写。 using System; using System.Collections.Generic; using System.Text; namespace 继承 { cla ......
protected 在基类中定义后,能被派生类调用,但是不能被其他类调用。
virtual 在基类中定义后,在派生类中能被重写。
using system; using system.collections.generic; using system.text; namespace 继承 { class vertebrate { protected string spine;//受保护的字段 private double weigth; private double temperature; public double weigth { set { if (value < 0) { weigth = 0; } else { weigth = value; } } get { return weigth; } } public double temperature { set { if (value < 0) { temperature = 0; } else { temperature = value; } } get { return temperature; } } public vertebrate() { spine = "脊柱"; weigth = 0; temperature = 0; } public virtual void breate() //虚方法 { console.writeline("呼吸"); } public void sleep() { console.writeline("睡觉"); } } }
using system; using system.collections.generic; using system.text; namespace 继承 { class program { static void main(string[] args) { vertebrate vertebrate = new vertebrate(); vertebrate.spine1 = "脊柱"; //public的就能被直接调用 mammal mammal = new mammal(); fish fish = new fish(); animal animal = new animal(); console.writeline("我是一只哺乳动物"); mammal.scukle(); animal.breate(); mammal.breate(); fish.breate(); mammal.sleep(); mammal.message(); } } class fish : vertebrate { public override void breate()//重写基类中的虚方法 { console.writeline("用鳃呼吸"); } } class animal : vertebrate { } class mammal : vertebrate//派生类:基类 { private string arms; private string legs; private int age; public int age { set { age = value; } get { return age; } } public mammal() { arms = "前肢"; legs = "后肢"; age = 0; weigth = 10; temperature = 37; } public void scukle() { console.writeline("哺乳"); } public override void breate() { console.writeline("用肺呼吸"); } public void message() { console.writeline("体重:{0}", weigth); console.writeline("年龄:{0}", age); console.writeline("体温:{0}", temperature); console.writeline("我有{0}和{1}", arms, legs); } } }