c#成绩排序，求帮助

Question

题目考试成绩排序
要求
1实现从高到低排序
2统计分组人数及百分比（分为大于等于90807060及不及挌）
3分数数据来源于文本文件
4处理结果保存在一个文本文件中

Answer 1

C#代码如下

using System;
using System.IO;
using System.Linq;

namespace ScoreSorter
{
    class Program
    {
        static void Main(string[] args)
        {
            // 读取文件中的分数
            var scores = File.ReadAllLines("scores.txt")
                             .Select(line => int.Parse(line))
                             .ToList();

            // 从高到低排序
            scores.Sort((a, b) => b.CompareTo(a));

            // 统计分组人数及百分比
            var scoreGroups = new int[6];
            foreach (var score in scores)
            {
                if (score >= 90)
                {
                    scoreGroups[0]++;
                }
                else if (score >= 80)
                {
                    scoreGroups[1]++;
                }
                else if (score >= 70)
                {
                    scoreGroups[2]++;
                }
                else if (score >= 60)
                {
                    scoreGroups[3]++;
                }
                else
                {
                    scoreGroups[4]++;
                }
            }

            // 计算百分比
            var scoreGroupPercents = new double[6];
            for (int i = 0; i < scoreGroups.Length; i++)
            {
                scoreGroupPercents[i] = (double)scoreGroups[i] / scores.Count;
            }

            // 将排序后的分数和分组统计信息写入文件
            using (var writer = File.CreateText("output.txt"))
            {
                // 写入排序后的分数
                foreach (var score in scores)
                {
                    writer.WriteLine(score);
                }

                // 写入分组人数及百分比
                writer.WriteLine("90+: " + scoreGroups[0] + " " + scoreGroupPercents[0]);
                writer.WriteLine("80+: " + scoreGroups[1] + " " + scoreGroupPercents[1]);
                writer.WriteLine("70+: " + scoreGroups[2] + " " + scoreGroupPercents[2]);
                writer.WriteLine("60+: " + scoreGroups[3] + " " + scoreGroupPercents[3]);
                writer.WriteLine("<60: " + scoreGroups[4] + " " + scoreGroupPercents[4]);
            }
        }
    }
}