具体要求：

A．从控制台循环录入任意个同学的信息跟成绩（学号，姓名，C语言分数）使用结构体    

B．在控制台打印本班的总分和平均分，并打印本班最高分、最低分的学生信息

C．按成绩高低打印本班成绩册并排出名次

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace jiegouti2{    class Program    {        struct student        {            public string xuehao;            public string xingming;            public decimal fenshu;        }        static void Main(string[] args)        {            Console.WriteLine("欢迎使用学生分数管理系统！");            Console.WriteLine("请输入学生人数");            int shu = int.Parse(Console.ReadLine());            student[] shuzu = new student[shu];            decimal sum = 0;            for (int m = 0; m < shu; m++)            {                Console.WriteLine("请输入第{0}个学生的\n学号、姓名、C语言分数", m + 1);                string a = Console.ReadLine();                string[] b = a.Split(new char[] { '\t' });                shuzu[m].xuehao = b[0];                shuzu[m].xingming = b[1];                shuzu[m].fenshu = decimal.Parse(b[2]);                sum += shuzu[m].fenshu;            }            for (int m = 0; m < shu-1; m++)            {                for (int n = m+1; n < shu; n++)                {                    if (shuzu[m].fenshu < shuzu[n].fenshu)                    {                        student zhong = new student();                        zhong = shuzu[n];                        shuzu[n] = shuzu[m];                        shuzu[m] = zhong;                    }                }            }            Console.WriteLine("总分是：{0}", sum);            Console.WriteLine("平均分是：{0}", sum / shu);            Console.WriteLine("最高分是学号{0}姓名{1}的{2}分", shuzu[0].xuehao.ToString(), shuzu[0].xingming.ToString(), shuzu[0].fenshu.ToString());            Console.WriteLine("最低分是学号{0}姓名{1}的{2}分", shuzu[shu - 1].xuehao.ToString(), shuzu[shu - 1].xingming.ToString(), shuzu[shu - 1].fenshu.ToString());            Console.WriteLine("降序排列为：\n名次\t学号\t姓名\t分数");            for (int m = 0; m < shu; m++)            {                Console.WriteLine((m+1)+"\t"+shuzu[m].xuehao + "\t" + shuzu[m].xingming + "\t" + shuzu[m].fenshu);            }            Console.ReadLine();        }    }}

效果如下图所示：