-c#实验报告7实验报告实验七：类的继承和抽象类实验⽬的掌握⾯向对象的设计，类的定义和对象的使⽤⼀、实验内容1．建⽴三个类：居民、成⼈、官员。
居民包含⾝份证号、姓名、出⽣⽇期，⽽成⼈继承⾃居民，多包含学历、职业两项数据；官员则继承⾃成⼈，多包含党派、职务两项数据。
要求每个类中都提供数据输出的功能2.编写⼀个控制台应⽤程序，完成下列功能，并写出运⾏程序后输出的结果。
1）创建⼀个类A，在A中编写⼀个可以被重写的带int类型参数的⽅法MyMethod，并在该⽅法中输出传递的整型值后加10后的结果。
2）再创建⼀个类B，使其继承⾃类A，然后重写A中的MyMethod⽅法，将A中接收的整型值加50，并输出结果。
3）在Main⽅法中分别创建A和类B的对象，并分别调⽤MyMethod⽅法。
3.要求：编写⼀个shape类，实现2个虚⽅法cirle()和 area().编写⼀个triangle（三⾓形）类该类继承⾃shape类，该类中有分别定义三⾓形的三条边，通过构造函数给各个边初始化，重写⽗类的circle()和area()⽅法，分写输出三⾓形的周长和⾯积编写⼀个rectangle(矩形类)类该类继承⾃shape类，该类中有分别定义矩形的宽和⾼，通过构造函数给各个边初始化，重写⽗类的circle()和area()⽅法，分写输出矩形的周长和⾯积编写⼀个circular(圆形)类该类继承⾃shape类，该类中有分别定义半径，通过构造函数给各个边初始化，重写⽗类的circle()和area()⽅法，分写输出圆形的周长和⾯积提⾼性练习，在上述代码基础上定义operation类，在该类中定义⼀个以shape 类对象作为参数的⽅法，实现类的多态性。
实验环境1.硬件：学⽣⽤微机、局域⽹环境2.软件：Windows XP中⽂操作系统vs2008及以上版本⼆、实验调试与结果分析（附上代码，以及运⾏结果的截图）第⼀题：using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication5{public class Resident{private string id;private string name;private string birthday;public Resident(string id, string name, string birthday){this.id = id;/doc/df17881626.html= name;this.birthday = birthday;}public void dispaly(){Console.WriteLine("⾝份证号是：{0}\t"+"姓名：{1}\t"+"出⽣⽇期：{2}\t",id,name,birthday);}}public class Adult : Resident{private string xueli;private string zhiye;public Adult(string id, string name, string birthday, string xueli, string zhiye): base(id, name, birthday){this.xueli = xueli;this.zhiye = zhiye;}public new void dispaly(){base.dispaly();Console.WriteLine("学历：{0}\t"+"职业：{1}\t",xueli,zhiye);}}public class Offical:Adult{private string dangpai;private string zhiwu;public Offical (string id, string name, string birthday, string xueli, string zhiye,string dangpai,string zhiwu):base(id,name,birthday ,xueli,zhiye){this .dangpai=dangpai;this.zhiwu=zhiwu;}public new void dispaly(){base.dispaly();Console.WriteLine("党派：{0}\t" + "职务：{1}\t",dangpai,zhiwu);}}}using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication5{class Program{static void Main(string[] args){Resident A = new Resident("123456789","张三丰","1993.07.5");A.dispaly();Adult B = new Adult("2334352","李伟","1990.06.8","本科","软件测试员");B.dispaly();Offical C = new Offical("23411111","王明","1987","本科","⽼师","共产党","班主任");C.dispaly();Console.ReadKey();}}}第⼆题：using System;using System.Collections.Generic; using System.Linq;using System.Text;namespace ConsoleApplication14 { class Class1{public int a;public Class1(int a){this.a = a;}public int MyMethod(){return a + 10;}}class Class2 : Class1{public Class2(int a): base(a){this.a = a;}public new int MyMethod(){int b = base.MyMethod();return (b + 50);}}}using System;using System.Collections.Generic; using System.Linq;using System.Text;namespace ConsoleApplication14 {class Programstatic void Main(string[] args){Class1 A = new Class1(50);Console.WriteLine("结果为：{0}", A.MyMethod()); Class2 B = new Class2(100);Console.WriteLine("结果为：{0}", B.MyMethod()); Console.ReadKey();}}}第三题：using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication7{public abstract class Shape{public abstract double circle();public abstract double area(); }class Triangle : Shape{private double a;private double b;private double c;public Triangle(double a, double b, double c){this.a = a;this.b = b;this.c = c;}public override double area()double x = (a + b + c) / 2;double s = Math.Sqrt(x * (x - a) * (x - b) * (x - c)); return s;}public override double circle(){double l = a + b + c;return l;}}class Rectangle : Shape{private double x;private double y;public Rectangle(double x, double y) {this.x = x;this.y = y;}public override double area(){double s = x * y;return s;}public override double circle(){double l = 2 * (x + y);return l;}}class Circular : Shape{private double r;public Circular(double r){this.r = r;}public override double area() {double s = 3.14 * r * r;return s;}public override double circle() {double l = 2 * 3.14 * r;return l;}}}using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication7{class Program{static void Main(string[] args){Triangle a = new Triangle(7,8,9);double A = a.area();Console.WriteLine("三⾓形的⾯积是：{0}", A); double B = a.circle();Console.WriteLine("三⾓形的周长是：{0}", B); Rectangle b = new Rectangle(15,30); double C = b.area();Console.WriteLine("长⽅形的⾯积是：{0}", C); double D = b.circle();Console.WriteLine("长⽅形的周长是：{0}", D); Circular c = new Circular(5);double E = c.area();Console.WriteLine("圆的⾯积是：{0}", E);double F = c.circle();Console.WriteLine("圆的周长是：{0}", F);Console.ReadKey();}}}三、总结（说明实验过程中遇到的问题及解决办法；新发现或个⼈的收获；未解决/需进⼀步研讨的问题或建议新实验⽅法等.内容见后附的⼿写材料）。
