C#面向对象程序设计续-继承.doc

实验三 C#面向对象程序设计续-继承一、实验目的1 掌握面向对象程序设计继承与派生机制的概念；2 深入理解面向对象程序设计关于多态性的概念与特征；3 掌握泛型编程设计方法。二、实验内容（实验过程中编写的程序复制到本文件中，要求输出显示部分截图复制到本文件中，下课整理后上交）1 基于C#中继承和多态性的相关概念解决：定义一个Shape抽象类，在此基础上派生出两个抽象类TwoDimensionalShape和ThreeDimensionalShape类。TwoDimensionalShape类再派生Rectangle和Cirlce类。ThreeDimensionalShape类再派生Sphere和Cube类。TwoDimensionalShape只有抽象方法Area()计算二维图形面积；ThreeDimensionalShape只有抽象方法Area()计算三维图形表面积，抽象方法Volume()计算三维图形体积。创建一个程序，用Shape引用的数组保存层次中每个具体类的对象。程序输出，描述每个数组元素所指的对象。另外，在处理数组所有图形的循环中，要确定每个图形是TwoDimensionalShape还是ThreeDimensionalShape。如果是TwoDimensionalShape则显示面积，如果是ThreeDimensionalShape，则显示表面积和体积。输出类似：图形1是xxx，面积是yyy图形2是xxx，面积是yyy图形3是xxx，表面积是yyy，体积是zzz图形4是xxx，表面积是yyy，体积是zzz代码：using System;namespace _127 abstract public class Shape public const double PI = Math.PI; abstract public double Area(); abstract public double Volume(); abstract public class TwoDimensionalShape : Shape protected double x, y; public TwoDimensionalShape(double x1, double y1) x = x1; y = y1; public class Rectangle : TwoDimensionalShape public Rectangle(double x, double y) : base(x, y) public override double Area() return x * y; public override double Volume() return 0; public class Cirlce : TwoDimensionalShape public Cirlce(double r) : base(r, 0) public override double Area() return PI * x * x; public override double Volume() return 0; abstract public class ThreeDimensionalShape : Shape protected double x, y, z; public ThreeDimensionalShape(double x1, double y1, double z1) x = x1; y = y1; z = z1; public class Sphere : ThreeDimensionalShape public Sphere(double r1) : base(r1, 0, 0) public override double Area() return 4 * PI * x * x; public override double Volume() return 4 * PI * x * x * x / 3; public class Cube : ThreeDimensionalShape public Cube(double a, double b, double c) : base(a, b, c) public override double Area() return 2 * x * y + 2 * x * z + 2 * y * z; public override double Volume() return x * y * z; class Program static void Main(string args) Shape rectangle = new Rectangle(1, 2); Shape cirlce = new Cirlce(1); ThreeDimensionalShape sphere1 = new Sphere1); ThreeDimensionalShape sphere2 = new Sphere(1); ThreeDimensionalShape cube1 = new Cube(1, 2, 3); ThreeDimensionalShape cube2 = new Cube(1, 2, 3); Console.WriteLine(图形1是圆形t面积:0, rectangle.Area(); Console.WriteLine(图形2是长方形t面积:0, cirlce.Area(); Console.WriteLine(图形3是球体t表面积:0t体积:1, sphere1.Area(), sphere2.Volume(); Console.WriteLine(图形4是长方体t表面积:0t体积y:1, cube1.Area(), cube2.Volume(); 运行结果：2.完成P157习题10，将学生写成类，利用IComparable接口或IComparer接口，利用动态数组ArrayList中的函数进行排序。代码：using System;using System.Collections;namespace _127 class Program class Stud int xh; /学号 string xm; /姓名 int mathfs; /数学分数 int englishfs; /英语分数 int sum; /总分 public int pxh get return xh; public string pxm get return xm; public int psum() return sum = mathfs + englishfs; public Stud(int no, string name, int mdegree,int edegree) xh = no; xm = name; mathfs = mdegree; englishfs = edegree; public void disp() Console.WriteLine(t0t1tt2tt3t 4, xh, xm, mathfs,englishfs,psum(); public class myCompareClassxh : IComparer int IComparer.Compare(object x, object y) Stud a = (Stud)x; Stud b = (Stud)y; if (a.pxh b.pxh) return 1; else if (a.pxh = b.pxh) return 0; else return -1; public class myCompareClassxm : IComparer int IComparer.Compare(object x, object y) Stud a = (Stud)x; Stud b = (Stud)y; return String.Compare(a.pxm, b.pxm); public class myCompareClasssum : IComparer int IComparer.Compare(object x, object y) Stud a = (Stud)x; Stud b = (Stud)y; if (a.psum() b.psum() return 1; else if (a.psum() = b.psum() return 0; else return -1; static void disparr(ArrayList myarr, string str) Console.WriteLine(str); Console.WriteLine(t学号t姓名t 数学分数 英语分数 总分); foreach (Stud s in myarr) s.disp(); static void Main(string args) int i, n = 4; IComparer myComparerxh = new myCompareClassxh(); IComparer myComparerxm = new myCompareClassxm(); IComparer myComparersum = new myCompareClasssum(); ArrayList myarr = new ArrayList(); Stud st = new Stud4 new Stud(1, Smith, 82,87), new Stud(4, John, 88,78), new Stud(3, Mary, 95,90), new Stud(2, Cherr, 64,70) ; for (i = 0; i n; i+) myarr.Add(sti); disparr(myarr, 排序前： ); myarr.Sort(myComparerxh); disparr(myarr, 按学号升序排序后： ); myarr.Sort(myComparerxm); disparr(myarr, 按姓名词典次序排序后：); myarr.Sort(myComparersum ); disparr(myarr, 按总分降序排序后： ); 运行结果：3.利用泛型编程思想，模仿例7.14，写一个队列类MyQueue，实现元素的先进先出操作。P155代码：using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace proj_127 class Queue T data; int front; int rear; public Queue() data = new T10; front = 0; rear = 0; public bool QueueEmpty() return front = rear; public void push(T e) datarear = e; rear+; public void pop(ref T e) e = datafront; front+; class Program static void Main(string args) int e = 0; Queue s = new Queue(); s.push(1); s.push(2); s.push(3); Console.Write(整数栈出栈次序: ); while (!s.QueueEmpty() s.po