Question

用C#编写一个学生成绩管理系统，定义以下几个类

class Course
{
stringname;
int grade;
public Course()
{
}
public Course(string name)
{
this.name=name;
this.grade=-1;
}

public Course(string name, int grade)
{
}

}
classStudent
{
stringname;
Course[] myCourse;

publicStudent() //构造函数
{
}
publicStudent(string name, Course[] courses)
{
}
public int CourseGradeSum( )
{
}
public bool IsBetterThan(Student s1)
{
}
public static Student WhoIsBest(Student s1, Student s2)
{
}
public static Student WhoIsBest(Student[] ss)
{
}
public stringGetInfo()
{
}
添加只读属性EveGrade
}
class Test
{
public static void Main() {
Course[] a=new Course[3];
a[0]=new Course("数据结构",80);
a[1]=new Course("数据库",90);
a[2]=new Course("软件工程",70);
StudentJohn=new Student("John",a);
Course[] b=new Course[3];
b[0]=new Course("数据结构",70);
b[1]=new Course("数据库",80);
b[2]=new Course("软件工程",60);
Student Mike=new Student("Mike",b);
Course[] c=new Course[3];
c[0]=new Course("数据结构",90);
c[1]=new Course("数据库",80);
c[2]=new Course("软件工程",90);
Student Rose=new Student("Rose",c);

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication4
{
    class Course
    {
        private string name;
        private int grade;

        public Course(string name)
        {
            this.name = name;
            this.grade = -1;
        }
        public Course(string name, int grade)
        {
            this.name = name;
            this.grade = grade;
        }
        public string Name
        {
            get { return this.name; }
            set { this.name = value; }
        }
        public int Grade
        {
            get { return this.grade; }
            set { this.grade = value; }
        }
    }

    class Student
    {
        string name;
        Course[] myCourse;

        public Student(string name, Course[] courses)
        {
            this.name = name;
            myCourse = courses;
        }
        public int CourseGradeSum()
        {
            int sum = 0;
            for (int i = 0; i < myCourse.Length; i++)
            {
                sum += myCourse[i].Grade;
            }
            return sum;
        }
        public bool IsBetterThan(Student s1)
        {
            if (this.CourseGradeSum() > s1.CourseGradeSum()) return true;
            else return false;
        }
        public static Student WhoIsBest(Student s1, Student s2)
        {
            if (s1.IsBetterThan(s2)) return s1;
            else return s2;

        }
        public static Student WhoIsBest(Student[] ss)
        {
            int index = -1;

            int maxGradeSum = 0;
            for (int i = 0; i < ss.Length; i++)
            {
                if (ss[i].CourseGradeSum() > maxGradeSum)
                {
                    maxGradeSum = ss[i].CourseGradeSum();
                    index = i;
                }
            }
            return ss[index];

        }
        public string GetInfo()
        {
            return "姓名：" + name + "；总分：" + this.CourseGradeSum().ToString();
        }
    }
    //控制类    
    class Test
    {
        static void Main(string[] args)
        {
            Course[] a = new Course[3];
            a[0] = new Course("数据结构", 80);
            a[1] = new Course("数据库", 90);
            a[2] = new Course("软件工程", 70);
            Student John = new Student("John", a);
            Course[] b = new Course[3];
            b[0] = new Course("数据结构", 70);
            b[1] = new Course("数据库", 80);
            b[2] = new Course("软件工程", 60);
            Student Mike = new Student("Mike", b);
            Course[] c = new Course[3];
            c[0] = new Course("数据结构", 90);
            c[1] = new Course("数据库", 80);
            c[2] = new Course("软件工程", 90);
            Student Rose = new Student("Rose", c);

            Student[] ss = { John, Mike, Rose };

            Console.WriteLine("最佳学生：{0}", 
                Student.WhoIsBest(ss).GetInfo());
        }
    }
}