实验—面向对象的高程序设计.doc

代码：

using System;

using System.Windows.Forms;

namespace S5_1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

public abstract class Student

this.name = name;

this.age = age;

number++;

}

public string Name

{

get { return name; }

}

public virtual string type

{

type, age);

if (type == "小学生")

result += string.Format(",平均成绩为{0:N2}:\n", total() / 2);

else if (type == "中学生")

result += string.Format(",平均成绩为{0:N2}:\n", total() / 3);

result += string.Format(",总学分为{0:N2}:\n", total());

{

protected double chinese;

protected double math;

public Pupil(string name, int age, double chinese, double math)

: base(name, age)

{

this.chinese = chinese;

this.math = math;

}

public override string type

{

get { return "小学生"; }

}

public class Middle : Student

{

protected double chinese;

protected double math;