C#实验二实验报告3116010036陈志灵

1、福建农林大学计算机与信息学院实验报告系： 计算机与信息学院 专业： 计算机科学与技术 年级： 2011 姓名： 陈志灵 学号： 3116010036 实验室号 田C507 计算机号 108 实验时间： 2013.11.14 指导教师签字： 成绩： 实验名称：一、实验目的和要求1、理解继承在软件工程中的作用。2、掌握多态的“通用编程”的思想。3、掌握运算符重载。二、实验内容和原理1、多态在工资系统中的应用。请给出一个根据员工类型完成每周工资单计算的程序，具体要求如下：（1） 定义一个类Employee作为父类，该类有三个子类：Boss类、PieceWorker类、HourlyWorker。（2）

2、 Boss类的工资计算的原则：不计工作时间，每周获得固定工资。（3） PieceWorker类的工资计算原则：根据生产的产品数量，每周发放工资。（4） HourlyWorker类的工资计算原则：根据工作时间，每周发放工资。每周工作的时间不超过40小时。（5） Employee类中定义了一个方法Earnings()，该方法没有实质性的工作；而在每个子类中都提供了恰当的Earnings()方法的重写。（6） 定义TestEmployee类，在其Main方法中，创建三种类型的员工对象，并计算相应的工资。2、请定义一个矩阵类，实现矩阵的转置、矩阵元素值的取反、矩阵的相减、矩阵的相加、矩阵的相乘、以及将

3、矩阵元素的值乘以n等运算。参考实验步骤及类图：（1）在Matrix类中，定义私有变量rows、cols和mat。（2）定义两个构造方法：Matrix(int iRow, int Cols)，Matrix(int iRow, int Cols, int dispersion )。其中，参数dispersion指定随机生成的矩阵元素的范围。如参数值dispersion为5，则使得矩阵元素的值在-55的范围内。（3）定义属性Rows和Cols。在Set访问器中，提供参数合法性检查的代码。（4）定义索引器thisint iRow, int iCol，实现根据行列号访问矩阵中的元素。（5）重写ToStr

4、ing()方法，以“矩阵”的格式输出矩阵中的所有元素。（6）定义私有方法Matrix StrassenMultiply(Matrix A, Matrix B) ，实现两个矩阵的相乘。（7）定义私有方法Matrix Multiply(double n, Matrix m)，实现将矩阵元素的值乘以n。（8）定义私有方法 Matrix Add(Matrix m1, Matrix m2)，实现两个矩阵的相加。（9）调用上述方法，重载运算符“-”、“+”、“*”，依次实现将矩阵元素的取反、矩阵的相减、矩阵的相加、矩阵的相乘、以及将矩阵元素的值乘以n五类运算。如：public static Matrix

5、operator -(Matrix m) return Matrix.Multiply(-1, m); public static Matrix operator -(Matrix m1, Matrix m2) return Matrix.Add(m1, -m2); （10）定义public static Matrix Transpose(Matrix m)方法，生成转置矩阵。（11）定义Test类，在其Main方法中，完成相关测试。三、实验环境Windows 7四、算法描述及实验步骤这个实验主要做类的继承以及运算符的重载，在充分理解继承和运算符重载，在编写代码是没什么困难的。五、调试过程在测

6、试结果的时候，发现总是要输入矩阵的值，经过检查发现原来是每个重载里面都用到构造方法Matrix(int iRows,int iCols)，而这个方法里面每次都要输入矩阵，所以重载的方法中的矩阵的初始化都被我改成无参构造，通过赋值初始化其他成员变量。六、实验结果1.2.七、总结这次实验熟悉了类的继承和运算符的重载，更加了解C#编程的一些细节，也学了些快捷键。写代码的时候要注意编译器给出的错误提示，找出错误，然后更改，记住错误发生的原因，争取以后不犯同样的错误。附录：1.Employee.csusing System;using System.Collections.Generic;using S

7、ystem.Linq;using System.Text;using System.Threading.Tasks;namespace shiyan2 abstract class Employee private string name; public string Name set = value; get retur; public Employee() public abstract decimal Earnings(); public abstract string Tostring(); HourlyWorker.csusing System;using System.Collec

8、tions.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace shiyan2 class HourlyWorker : Employee private decimal hours; private decimal wageOfHour; public decimal Hours set this.hours = value; get return this.hours; public decimal WageOfHour set this.wageOfHour = value;

9、 get return this.wageOfHour; public HourlyWorker() : base() this.hours = 0; this.wageOfHour = 0; public override decimal Earnings() if (this.hours > 40) Console.WriteLine("工作时间超过40小时"); return 0; else return this.hours * this.wageOfHour; public override string Tostring() string str = &q

10、uot;" str += this.Earnings() + "" return str; Boss.csusing System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace shiyan2 class Boss : Employee private decimal weeklySalary; public decimal WeeklySalary set this.weeklySalary =

11、 value; get return this.weeklySalary; public Boss():base() this.weeklySalary = 0; public override decimal Earnings() return this.weeklySalary; public override string Tostring() string str = "" str += this.Earnings() + "" return str; PieceWorker.csusing System;using System.Collect

12、ions.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace shiyan2 class PieceWorker : Employee private int quantity; private decimal wageOfPiece; public int Quantity set this.quantity = value; get return this.quantity; public decimal WageOfPiece set this.wageOfPiece = v

13、alue; get return this.wageOfPiece; public PieceWorker():base() this.quantity = 0; this.wageOfPiece = 0; public override decimal Earnings() return this.quantity * this.wageOfPiece; public override string Tostring() string str = "" str += this.Earnings() + "" return str; 2.using Sy

14、stem;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace shiyan2 class Matrix private int rows; private int cols; private int, mat; public int Rows set this.rows = value; get return this.rows; public int Cols set this.cols = value; get return t

15、his.cols; public int thisint iRow, int iCol set matiRow,iCol = value; get return matiRow,iCol; public Matrix() public Matrix(int iRows, int iCols) this.rows = iRows; this.cols = iCols; this.mat = new intthis.rows,this.cols; Console.WriteLine("请依次输入矩阵的各个元素："); for (int i = 0; i < iRows;

16、i+) for (int j = 0; j < iCols; j+) this.mati, j = System.Int32.Parse(Console.ReadLine(); public Matrix(int iRow, int iCol, int dispersion) this.rows = iRow; this.cols = iCol; this.mat = new intthis.rows,this.cols; for (int i = 0; i < this.rows; i+) for (int j = 0; j < this.cols; j+) Random

17、ran = new Random(); this.mati,j = ran.Next(-1*dispersion,dispersion); System.Threading.Thread.Sleep(50); private static Matrix Add(Matrix m1, Matrix m2) Matrix sum = null; if (m1.rows != m2.rows | m1.cols != m2.cols) Console.WriteLine("矩阵行列数不同,不能进行加减运算!"); else sum = new Matrix(); sum.rows

18、 = m1.rows; sum.cols = m1.cols; int, mat = new intm1.rows,m1.cols; for (int i = 0; i < m1.rows; i+) for (int j = 0; j < m1.cols; j+) mati, j = m1.mati, j + m2.mati, j; sum.mat = mat; return sum; private static Matrix Multiply(int n, Matrix m) Matrix a = new Matrix(); a.rows = m.rows; a.cols =

19、m.cols; int, mat = new inta.rows, a.cols; for (int i = 0; i < m.rows; i+) for (int j = 0; j < m.cols; j+) mati, j = n * m.mati, j; a.mat = mat; return a; private static Matrix StrassenMultiply(Matrix A, Matrix B) Matrix a = null; if (A.rows != B.cols) Console.WriteLine("矩阵维数不匹配"); el

20、se a = new Matrix(A.rows, B.cols); a.rows = A.rows; a.cols = A.cols; int, mat = new intA.rows, A.cols; for (int i = 0; i < A.rows; i+) for (int j = 0; j < B.cols; j+) mati, j = 0; for (int k = 0; k < A.cols; k+) mati, j += A.mati, k * B.matk, j; a.mat = mat; return a; public static Matrix o

21、perator -(Matrix m)/添加负号的情况 return Matrix.Multiply(-1, m); public static Matrix operator -(Matrix m1, Matrix m2) return Matrix.Add(m1, -m2); public static Matrix operator *(int n,Matrix m) return Matrix.Multiply(n, m); public static Matrix operator *(Matrix m1,Matrix m2) return Matrix.StrassenMultip

22、ly(m1, m2); public static Matrix operator +(Matrix m1, Matrix m2) return Matrix.Add(m1, m2); public Matrix Transpose(Matrix m) Matrix res = new Matrix(); res.rows = m.cols; res.cols = m.rows; int, mat = new intres.rows, res.cols; for (int i = 0; i < res.rows; i+) for (int j = 0; j < res.cols;

23、j+) mati,j = m.matj,i; res.mat = mat; return res; public override string ToString() string result = "" for (int i = 0; i < rows; i+) for (int j = 0; j < cols; j+) result += mati, j + " " if (j = cols - 1) result += "n" return result; class Test static void Main(st

24、ring args) while (true) Console.WriteLine("请输入矩阵的个数(1或2,0退出)"); int cnt = Int32.Parse(Console.ReadLine(); if (cnt = 1) Matrix m = null; int x, y, z; Console.WriteLine("请依次输入矩阵行和列的大小："); x = Int32.Parse(Console.ReadLine(); y = Int32.Parse(Console.ReadLine(); Console.WriteLine(&quo

25、t;请输入矩阵元素随机值范围(不设置随机请输入0)："); z = Int32.Parse(Console.ReadLine(); if (z = 0) m = new Matrix(x, y); else m = new Matrix(x, y, z); Console.WriteLine("矩阵为：n" + m); while (true) Console.WriteLine("1.矩阵乘n 2.矩阵转置 3.矩阵取反 4.返回 请输入:"); string count = Console.ReadLine(); if (count = &

26、quot;1") Console.WriteLine("请输入一个整数n："); int n = Int32.Parse(Console.ReadLine(); Console.WriteLine("矩阵乘n结果为：n" + n*m); else if (count = "2") Console.WriteLine("矩阵转置结果为：n" + m.Transpose(m); else if (count = "3") Console.WriteLine("矩阵取反结果为：n&

27、quot; + (-m); else if (count = "4") Console.WriteLine("您选择了返回！"); Console.ReadKey(); break; else if (cnt = 2) Matrix m1 = null; Matrix m2 = null; int x1, y1, z1, x2, y2, z2; Console.WriteLine("请依次输入第一个矩阵行和列的大小："); x1 = Int32.Parse(Console.ReadLine(); y1 = Int32.Parse(Console.ReadLine(); Console.WriteLine("请输入第一个矩阵元素随机值范围(不设置随机请输入0)："); z1 = Int32.Parse(Console.ReadLine(); if (z1 = 0) m1 = new Matrix(x1, y1); else m1 = new Matrix(x1, y1, z1); Con