win 第二次作业对类成员进行排序

最新推荐文章于 2025-12-13 15:00:00 发布

原创最新推荐文章于 2025-12-13 15:00:00 发布 · 85 阅读

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#windows #开发语言

文章讲述了如何创建一个名为Student的类，该类实现Comparable接口，通过重写CompareTo方法按照成绩进行排序。在Main方法中，创建了Student对象数组并用Array.Sort进行排序，然后打印排序后的学生信息。这展示了面向对象编程中接口的应用和基于属性的排序逻辑。

题目

1、题目说明：学生类包括成绩、科目和学号，请根据课程成绩grade将学生进行排序。
2、部分代码如下，请将代码补充完整
public class Student : Comparable
{
    public double mygrade;
    public string mysubject, myID;
    public Student() { }
    public Student(double grade, string subject, string id)
    {
        mygrade = grade;
        mysubject = subject;
        myID = id;
    }
   请在此处添加关键代码···
}

internal class Program
{
    
    private static void Main(string[] args)
    {
        Student[] students = new Student[5];
        students[0] = new Student(50.0, "windows程序设计", "001");
        students[1] = new Student(90.0, "windows程序设计", "002");
        students[2] = new Student(100.0, "windows程序设计", "003");
        students[3] = new Student(70.0, "windows程序设计", "004");
        students[4] = new Student(80.0, "windows程序设计", "005");
      请在此处添加关键代码···
    }

}

思路

对Student类的对象进行排序，类继承了接口Comparable，接口有且有唯一方法CompareTo，对方法进行定义，mygrate作为决定值。

int IComparable.CompareTo(Object obj)
    {
        if (obj is Student)
        {
            Student castObj = obj as Student;
            if (this.mygrade > castObj.mygrade) return 1;
            else if (this.mygrade < castObj.mygrade) return -1;
            else return 0;
        }
        throw new ArgumentException();
    }

用array.sort方法对对象列表进行排序，因为已经定义了compareto方法所以默认以grate为决定值

Array.Sort(students);
        foreach (Student c in students)
        {
            Console.WriteLine(c.mygrade + " " + c.mysubject + " " + c.myID);
        }

最后对列表进行输出。

代码：

public class Student : IComparable
{   
    public double mygrade;
    public string mysubject, myID;
    public Student() { }
    public Student(double grade, string subject, string id)
    {
        mygrade = grade;
        mysubject = subject;
        myID = id;
    }

    int IComparable.CompareTo(Object obj)
    {
        if (obj is Student)
        {
            Student castObj = obj as Student;
            if (this.mygrade > castObj.mygrade) return 1;
            else if (this.mygrade < castObj.mygrade) return -1;
            else return 0;
        }
        throw new ArgumentException();
    }
    //请在此处添加关键代码···
}

internal class Program
{

    private static void Main(string[] args)
    {
        Student[] students = new Student[5];
        students[0] = new Student(50.0, "windows程序设计", "001");
        students[1] = new Student(90.0, "windows程序设计", "002");
        students[2] = new Student(100.0, "windows程序设计", "003");
        students[3] = new Student(70.0, "windows程序设计", "004");
        students[4] = new Student(80.0, "windows程序设计", "005");

        Array.Sort(students);
        foreach (Student c in students)
        {
            Console.WriteLine(c.mygrade + " " + c.mysubject + " " + c.myID);
        }
    }

}