实验要求
根据类图编写程序，其中Person中的Eat方法定义为虚方法，Baby和Adult类对该方法进行重写。
（华北理工大学信管专业C#课程作业--大一下学期）
解：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace tets { class Program { static void Main(string[] args) { Person baby = new Baby("zh","女"); baby.Eat(); Adult adult = new Adult("yy","男","大学"); adult.Eat(); adult.Speak(); Console.ReadKey(); } } /// <summary> /// 父类 /// </summary> class Person { private string name; private string gender; public Person() { } public Person(string name,string gender) { this.gender = gender; this.name = name; Console.WriteLine("我是人，性别{0}，我叫{1}", gender, name); } public virtual void Eat() { Console.WriteLine("我是人，我爱吃水果"); } } /// <summary> /// 子类Baby /// </summary> class Baby : Person { public Baby(string name,string gender):base(name,gender) { } public override void Eat() { Console.WriteLine("我是宝宝，我爱喝牛奶"); } } /// <summary> /// 子类Adult /// </summary> class Adult : Person { private string degree; public Adult(string name,string gender,string degree) { this.degree = degree; Console.WriteLine("我是{0},性别{1},我的学历是{2}", name,gender,degree); } public override void Eat() { Console.WriteLine("我是成年人，我爱吃面包"); } public void Speak() { Console.WriteLine("我是成年人，我会唱跳rap和篮球"); } } }
