VC#.NET 类的继承,多态和抽象的程序与运行结果.doc

实验内容（步骤、表格、算法或流程图等）1. 演示抽象类与抽象属性的使用2. 演示类的多态性源程序及注释(不足可加附页)1 using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1 public abstract class Shape /表示“形状”的抽象类型 private string m_id; /定义形状的m_id，一个私有字段 /声明构造函数，用来设置属性ID public Shape(string s) ID=s; public string ID /定义属性，用来操作私有字段m_id get return m_id; set m_id=value; /定义一个只读的抽象类型，表示形状的面积 public abstract double Area get; /重载从Object类继承来的方法 public override string ToString() return ID +面积= +string.Format(0:F2,Area); public class Square:Shape /正方形，从从抽象类Shape private int m_side;/正方形的边长 public Square (int side,string id) :base(id) m_side =side; /重载继承的抽象属性，取得正方形的面积 public override double Area get return m_side*m_side ; class TestClass static void Main(string args) /创建一个边长为5的正方形对象 Square s=new Square(5,正方形); string result=s.ToString(); Console .WriteLine (result); 2. using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1 public class Person public string Name; public char Sex; public Person(string name, char sex) Name = name; Sex = sex; public virtual string Answer() return string.Format(姓名:0,宁别:1., Name, Sex); public class Student : Person public string School; public int Score; public Student(string name, char sex, string school, int score) : base(name, sex) School = school; Score = score; public override string Answer() return string.Format(姓名:0,性别:1n学校:2,成绩3分., Name, Sex, School, Score); public class Worker : Person public string Department; public float Salary; public Worker(string name, char sex, string depart, float salary) : base(name, sex) Department = depart; Salary = salary; public override string Answer() return string.Format(姓名:0,性别：1n部门:2,薪水:3元., Name, Sex, Department, Salary); class Program static void Main(string args) Student s = new Student(张伟, 男, 电子科大成都学院, 480); Console.WriteLine(该学生信息如下：); Console.WriteLine(s.Answer(); Worker w =