学生成绩管理系统

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

namespace @string
{
    class Program
    {
        static void Main(string[] args)
        {

            Stu_Manage myuser = new Stu_Manage();
            myuser.Chech();
        }
    }
    public class Student
    {
        public int no;
        public double math, english;
        public double csharp, network;
        public double avg, all;
        public string name;
        //显示学生信息
        public void ShowStuInfo()
        {
            Console.WriteLine("\n学生信息：");
            Console.WriteLine("\n学号：{0}", no);
            Console.WriteLine("\t姓名：{1}：", name);
            Console.WriteLine("\t数学：{2}", math);
            Console.WriteLine("\t英语：{3}", english);
            Console.WriteLine("\t   c#：{4}", csharp);
            Console.WriteLine("\t计算机网络：{5}", network);
            Console.WriteLine("\t平均成绩：{6}", avg);
            Console.WriteLine("\t总成绩：{7}", all);
            Console.WriteLine();
        }
    }
    //定义学生信息管理类
    class Stu_Manage
    {
        int x = 0;
        //声明一个结构体类数组，数组名stud
        Student[] stud = new Student[10];
        //Add()方法添加学生信息
        public void Add()
        {
            Console.WriteLine("请输入要添加的学生的信息：");
            Console.WriteLine("请输入学号：");
            stud[x].no = int.Parse(Console.ReadLine());
            Console.WriteLine("\n请输入姓名：");
            stud[x].name = Console.ReadLine();
            Console.WriteLine("\n数学成绩:");
            stud[x].math = double.Parse(Console.ReadLine());
            Console.WriteLine("\n英语成绩：");
            stud[x].english = double.Parse(Console.ReadLine());
            Console.WriteLine("\nC#成绩：");
            stud[x].csharp = double.Parse(Console.ReadLine());
            Console.WriteLine("\n计算机网络成绩:");
            stud[x].network = double.Parse(Console.ReadLine());
            //定义一个数组将输入的成绩存储
            double[] inform = new double[] { stud[x].math, stud[x].english, stud[x].csharp, stud[x].network };
            for (int i = 0; i < inform.Length; i++)
            {
                stud[x].all += inform[i];
                stud[x].avg = stud[x].all / 4;
                stud[x].ShowStuInfo();
                x = x + 1;
            }
        }
        public void Delete()
        {
            int n = -1;
            int no = int.Parse(Console.ReadLine());
            for (int i = 0; i < x; i++)
            {
                if (no == stud[i].no)
                {
                    n = i;
                    for (int c = n + 1; c < x; c++)
                    {
                        //交换数组索引值，对指定元素进行删除
                        stud[c - 1] = stud[c];
                    }
                    x = x - 1;
                    break;
                }
            }
        }
        public void Search_no()
        {
            int n = -1;
            int no = int.Parse(Console.ReadLine());
            for (int i = 0; i < x; i++)
            {
                if (no == stud[i].no)
                {
                    n = i;
                    stud[i].ShowStuInfo();
                    break;
                }
            }
            if (n == -1)
            {
                Console.WriteLine();
            }
        }
        public void Search_name()
        {
            int n = -1;
            string name = Console.ReadLine();
            for (int i = 0; i < x; i++)
            {
                if (name == stud[i].name)
                {
                    n = i;
                    stud[i].ShowStuInfo();
                    break;
                }
            }
            if (n == -1)
            {
                Console.WriteLine();
            }
        }
        public void Search_score()
        {
            for (int i = x - 1; i >= 0; i--)
            {
                for (int j = 0; j <= i; j++)
                {
                    if (stud[j].all > stud[j + 1].all)
                    {
                        stud[x] = stud[j];
                        stud[j] = stud[j + 1];
                        stud[j + 1] = stud[x];

                    }
                }
            }
            int[] mc = new int[x];
            for (int i = 0; i < x; i++)
            {
                mc[i] = i + 1;
                Console.WriteLine(stud[i].no + "\t");
                Console.WriteLine(stud[i].name + "\t");
                Console.WriteLine(stud[i].math + "\t");
                Console.WriteLine(stud[i].english + "\t");
                Console.WriteLine(stud[i].csharp + "\t");
                Console.WriteLine(stud[i].network + "\t");
                Console.WriteLine(stud[i].avg + "\t");
                Console.WriteLine(stud[i].all + "\t");
                Console.WriteLine();
            }
        }
        public void Chech()
        {
            do
            {
                Console.WriteLine("请选择：\n 1、添加学生信息\n 2、删除学生信息\n 3、查询按学号\n 4、查询按姓名\n 5、查询成绩单\n 6、退出系统");
                int number = int.Parse(Console.ReadLine());
                if (number > 6 || number < 1)
                {
                    Console.WriteLine("输入有误请重新输入");

                }
                switch (number)
                {
                    case 1:
                        Add();
                        break;
                    case 2:
                        Console.WriteLine("请输入要删除学生的学号：");
                        Delete();
                        break;
                    case 3:
                        Console.WriteLine("请输入学号：");
                        Search_no();
                        break;
                    case 4:
                        Console.WriteLine("请输入姓名：");
                        Search_name();
                        break;
                    case 5:
                        Console.WriteLine("成绩单：");
                        Console.WriteLine("名次\t学号\t姓名\t数学\t英语\tC#\t计算机网络\t平均\t总成绩");
                        Search_score();
                        break;
                    case 6:
                        Environment.Exit(0);
                        break;
                }
                Console.WriteLine("\n是否要继续！");
            } while (true);
        }
    }
}