实验三-类的重载继承和多态

1、-. z.实验报告课程名称面向对象程序设计实验名称实验三、类的重载继承和多态日期学生*班级实验目的：1编写一个单一继承的C#程序2编写一个抽象类，并用一个类继承这个抽象类实验要求：1.认真阅读、掌握和本实验相关的教材容。2.设计并编写代码完成题目要求的任务。3.撰写实验报告。实验容与步骤：1在学校教务管理系统中，有三种用户，一种是系统管理员，一种是学生，一种是教师，编写C#类实现该继承关系。系统管理员/学生/教师都有用户名和密码属性，并都有Login和显示自身信息的方法，另外，学生拥有班级和成绩两个特殊属性以及查询成绩这一方法，教师拥有部门和工资两个特殊属性以及查询工资这一方法，系统管理员可以

2、添加学生和教师信息。由于教师和学生个人信息不同，所以学生和教师重载基类的DisplayInfo方法。本例和教材一致，再次出现的目的是通过反复训练，理解继承的作用1类的继承关系可以表示如下：2创立控制台应用程序，命名为SchoolManagement3创立名为User的基类，基类定义了用户名和密码属性，以及Login和DisplayInfo方法using System;using System.Collections.Generic;using System.Te*t;namespace SchoolManagementpublicclassUser privatestring userName

3、;/用户名publicstring Name get return userName; set userName = value; privatestring password;/密码publicstring Password get return password; set password = value; privatestring userType;/用户类型publicstring UserType get return userType; set userType = value; publicvoid Login() if (userName.Equals(1) & passwo

4、rd.Equals(1) DisplayPersonInfo(); publicvirtualvoid DisplayPersonInfo() /注意virtual关键字 Console.WriteLine(:0, userName);Console.WriteLine(用户类型:0, userType); 2创立名为Student的派生类，具备班级和成绩两个特殊属性，以及查询成绩的特殊方法,覆盖基类的显示个人信息方法using System;using System.Collections.Generic;using System.Te*t;namespace SchoolManagemen

5、tpublicclassStudent : User privatestring classID;publicstring ClassID get return classID; set classID = value; privatefloat stuScore;publicfloat StuScore get return stuScore; set stuScore = value; public Student() UserType = 学生; publicoverridevoid DisplayPersonInfo() base.DisplayPersonInfo();Console

6、.WriteLine(班级:0, classID ); publicvoid CheckScore() Console.WriteLine(成绩:0,this.stuScore); 3创立名为Teacher的派生类，具备部门和工资两个特殊属性，以及查询工资的特殊方法,覆盖基类的显示个人信息方法。using System;using System.Collections.Generic;using System.Te*t;namespace SchoolManagementpublicclassTeacher : User privatestring department;/部门publicst

7、ring Department get return department; set department = value; privatefloat salary;/工资publicfloat Salary get return salary; set salary = value; public Teacher() UserType = 教师; publicoverridevoid DisplayPersonInfo() base.DisplayPersonInfo();Console.WriteLine(部门: + this.department); publicvoid checkSa

8、lary() Console.WriteLine(工资: + this.salary); 4创立名为SysManager的派生类，具备插入学生信息和插入教师信息两个方法using System;using System.Collections.Generic;using System.Te*t;namespace SchoolManagementpublicclassSysManager : User public SysManager() UserType = 管理员; publicStudent InsertStudent() Student stu = newStudent(); stu

9、.Name = 郭郭; stu.UserType = 教师; stu.ClassID = 310730; stu.StuScore = 70;return stu; publicTeacher InsertTeacher() Teacher teacher = newTeacher(); teacher.Name =沙沙; teacher.Department = 计算机系; teacher.Salary = 5000;return teacher; 5在Program.cs的Main方法中调用以上类，测试效果如下：using System;using System.Collections.G

10、eneric;using System.Te*t;namespace SchoolManagementclassProgram staticvoid Main(string args) /系统管理员登录SysManager sys = newSysManager(); sys.Name = 1; sys.Password = 1; sys.Login();Console.WriteLine(-);/系统管理员录入学生和教师信息Teacher teacher = sys.InsertTeacher();Student stu = sys.InsertStudent();/显示教师信息，查询工资

11、teacher.DisplayPersonInfo(); teacher.checkSalary();Console.WriteLine(-);/显示学生信息，查询成绩 stu.DisplayPersonInfo(); stu.CheckScore();Console.WriteLine(-); 6最终运行效果如下2建立名为Shape的基类，要抽象类，在该类中提供一个public abstract double Area()的抽象方法，建立名为Circle的派生类，包括半径属性，实现面积计算，再建立一个名为Rectangle的派生类，包括长和宽两个属性，实现面积的计算。using System

12、;using System.Collections.Generic;using System.Linq;using System.Te*t;namespace GetAreaclassProgram staticvoid Main(string args) Console.WriteLine(请输入圆2的半径:);double r=double.Parse (Console.ReadLine ();shape s = newCircle(r);Console.WriteLine(圆2的面积y是:0n,s.Area();Console.WriteLine(请输入矩形的长和宽:);Console.

13、Write(长:);double a=double.Parse (Console.ReadLine ();Console.Write(宽:);double b=double.Parse (Console.ReadLine ();shape f = newRectangle(a, b);Console.WriteLine(矩形的面积y是:0,f.Area();Console .ReadLine (); publicabstractclassshape publicabstractdouble Area(); publicclassCircle : shape privatedouble r;pu

14、blicdouble R get return r; set r = value; public Circle(double r) this.r = r; publicoverridedouble Area() returnMath.PI * r * r; publicclassRectangle : shape privatedouble side;publicdouble Side get return side; set side = value; privatedouble high;publicdouble High get return high; set high = value; p