使用C# 定义一个人员类 CPerson,包括数据成员:姓名、编号、性别和用于输入/输出的成员函数。在此基础上派生出学生类Cstudent(增-加成绩)和教师类CTeacher(增加教龄),并实现对学生和教师信息的输入/输出。

在C#中，我们可以首先定义一个基础的`CPerson`类，然后基于这个类创建两个派生类`CStudent`和`CTeacher`。这里是一个简单的示例：

// 定义基础人员类 CPerson
public class CPerson
{
    public string Name { get; set; }
    public int ID { get; set; }
    public char Gender { get; set; }

    // 构造函数
    public CPerson(string name, int id, char gender)
    {
        Name = name;
        ID = id;
        Gender = gender;
    }

    // 输入输出成员函数
    public void DisplayInfo()
    {
        Console.WriteLine($"Name: {Name}, ID: {ID}, Gender: {Gender}");
    }
}

// 派生学生类 CStudent
public class CStudent : CPerson
{
    public double Grade { get; set; }

    public CStudent(string name, int id, char gender, double grade)
        : base(name, id, gender)
    {
        Grade = grade;
    }

    // 增加成绩功能
    public void UpdateGrade(double newGrade)
    {
        Grade = newGrade;
    }

    // 输入输出成员函数扩展
    public override void DisplayInfo()
    {
        base.DisplayInfo();
        Console.WriteLine($"Grade: {Grade}");
    }
}

// 派生教师类 CTeacher
public class CTeacher : CPerson
{
    public int YearsOfTeaching { get; set; }

    public CTeacher(string name, int id, char gender, int yearsOfTeaching)
        : base(name, id, gender)
    {
        YearsOfTeaching = yearsOfTeaching;
    }

    // 增加教龄功能
    public void UpdateYearsOfTeaching(int newYears)
    {
        YearsOfTeaching = newYears;
    }

    // 输入输出成员函数扩展
    public override void DisplayInfo()
    {
        base.DisplayInfo();
        Console.WriteLine($"Years of Teaching: {YearsOfTeaching}");
    }
}

现在你可以实例化这些类并显示他们的信息：

public static void Main(string[] args)
{
    CStudent student = new CStudent("张三", 1001, 'M', 90.5);
    student.UpdateGrade(95);
    student.DisplayInfo();

    CTeacher teacher = new CTeacher("李四", 2001, 'F', 10);
    teacher.UpdateYearsOfTeaching(15);
    teacher.DisplayInfo();
}