C#--利用Array類實現：計算總評成績

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

namespace text_1
{
    public class Student
    {
        public string SName
        {
            get;
            set;
        }
        public double  DScore
        {
            get;
            set;
        }
        public double TScore
        {
            get;
            set;
        }
        public double XScore
        {
            get;
            set;
        }
        public double  ZScore
        {
            get;
            set;
        }
        public double getAverageScore()
        {
            ZScore = DScore * 0.2 + TScore * 0.1 + XScore * 0.7;
            return ZScore;
        }
        public void displayInfo()
        {
            Console.WriteLine("{0}\t{1}\t{2}\t{3}\t{4})",
            SName,DScore,TScore,XScore,ZScore );
        }

    }
    class Program
    {
        static void Main(string[] args)
        {
            Array arrStudent = Array.CreateInstance(typeof(Student),5);
            Array arrScore = Array.CreateInstance(typeof(double), 5);
            for (int i = 0;i<5 ; i++)
            {
                Student st = new Student();
                Console.WriteLine("請輸入學生的姓名： \n");
                st.SName = Console.ReadLine();
                Console.WriteLine("請輸入學生{0}的德育成績： \n",st.SName);
                st.DScore = Convert.ToDouble(Console.ReadLine());
                Console.WriteLine("請輸入學生{0}的體育成績：\ n", st.SName);
                st.TScore = Convert.ToDouble(Console.ReadLine());
                Console.WriteLine("請\輸\入\學\生{0}的學習成績： \n", st.SName);
                st.XScore = Convert.ToDouble(Console.ReadLine());
                arrScore.SetValue(st.getAverageScore(),i);
                arrStudent.SetValue(st, i);
            }
            Array.Sort(arrScore,arrStudent );
            Array.Reverse(arrStudent);
            Console.WriteLine("學生排名如下： ");
            Console.WriteLine("姓名\t體育\t學習\t總評");
            for(int i = 0;i<5;i++)
            {
                Student st = (Student)arrStudent.GetValue(i);
                st.displayInfo();
            }
        }
    }
}