有没有哪位大哥能帮我把这个程序完善了（C#学生成绩管理系统）
using System;using System.IO;
public class StudentInfo
{
private int id;
private string name;
private float english;
private float math;
public int ID
{
get
{
return this.id;
}
set
{
this.id = value;
}
}
public string Name
{
get
{
return this.name;
}
set
{
this.name = value;
}
}
public float English
{
get
{
return this.english;
}
set
{
this.english = value;
}
}
public float Math
{
get
{
return this.math;
}
set
{
this.math = value;
}
}
public float PJ()
{
return (english + math)/2;
}
}
public class StudentDAL // 学生数据管理类
{
const int MAX = 30;
int count = 0;
StudentInfo[] students = new StudentInfo[MAX];
public StudentInfo[] Students
{
get
{
return students;
}
}
public int Count
{
get
{
return this.count;
}
}
public bool Insert(StudentInfo stu)// 添加一个学生
{
if (Count < MAX)
{
students[this.count] = stu;//插入学生信息
this.count++;
return true;
}
return false;
}
public StudentInfo[] FindID(int id) //通过学号找
{
StudentInfo[] stu = new StudentInfo[MAX];
int count = 0;
for (int i = 0; i < Count; i++)
{
if (students[i].ID == id)
{
stu[count] = students[i];
count++;
}
}
if (count > 0) //找到了
{
StudentInfo[] temp = new StudentInfo[count];
for (int i = 0; i < count; i++)
{
temp[i] = stu[i];
}
return temp;
}
return null;
}
public StudentInfo[] FindByName(string name) //通过姓名找
{
StudentInfo[] stu = new StudentInfo[MAX];
int count = 0;
for (int i = 0; i < Count; i++)
{
if (students[i].Name == name)
{
stu[count] = students[i];
count++;
}
}
if (count > 0)
{
StudentInfo[] temp = new StudentInfo[count]; //有几个相同就把几个加入数组
for (int i = 0; i < count; i++)
{
temp[i] = stu[i];
}
return temp;
}
return null;
}
public class StudentBLL //操作
{
StudentDAL stuDAL = new StudentDAL();
public bool Insert(StudentInfo stu)
{
while (this.FindID(stu.ID) != null)
{
Console.Write("对不起，该学号已存在，请输入一个新的学号：");
stu.ID = int.Parse (Console .ReadLine ());
}
return stuDAL.Insert(stu);
}
public StudentInfo[] FindID(int id)
{
return stuDAL.FindID(id);
}
public StudentInfo[] FindByName(string name)
{
return stuDAL.FindByName(name);
}
public void PrintHead()
{
Console.WriteLine("学号\t姓名\t英语成绩\t数学成绩\t平均成绩");
}
public void Print(StudentInfo stu)
{
Console.WriteLine("{0}\t{1}\t{2}\t\t{3}\t\t{4}", stu.ID, stu.Name, stu.English, stu.Math, stu.PJ());
}
public void Print(StudentInfo[] stus)
{
foreach (StudentInfo stu in stus)
{
this.Print(stu);
}
}
public void Print()
{
if (stuDAL.Count > 0)
{
this.PrintHead();
for (int i = 0; i < stuDAL.Count; i++)
{
this.Print(stuDAL.Students[i]);
}
Console.WriteLine("当前共有{0}名学生。", stuDAL.Count);
}
else
{
Console.WriteLine("对不起，当前还没有学生信息。。。");
}
}
public StudentInfo GenStudentInfo(bool needID)
{
StudentInfo info = new StudentInfo();
if (needID)
{
Console.Write("请输入学生的学号：");
info.ID = int.Parse(Console.ReadLine());
}
Console.Write("请输入学生的姓名：");
info.Name = Console.ReadLine();
Console.Write("请输入学生的英语成绩：");
info.English = float.Parse(Console.ReadLine());
Console.Write("请输入学生的数学成绩");
info.Math = float.Parse(Console.ReadLine());
return info;
}
public StudentInfo GenStudentInfo()
{
return this.GenStudentInfo(true);
}
}
class Program
{
static void Main(string[] args)
{
StudentBLL stuBLL = new StudentBLL();
StudentInfo[] infos;
Console.WriteLine("-------------------学生成绩管理系统-------------------");
while (true)
{
Console.WriteLine("请按键选择您要进行的操作：");
Console.WriteLine("1.添加一个学生 2.查看所有学生信息");
Console.WriteLine("3.通过姓名查找学生 4.通过学号查找学生");
Console.WriteLine("5.英语平均分 6.数学平均分");
Console.WriteLine("7.英语最高分 8.数学最高分");
Console.WriteLine("q.退出程序");
switch (Console.ReadLine())
{
case "1":
if (stuBLL.Insert(stuBLL.GenStudentInfo()))
{
Console.WriteLine("添加成功。");
}
else
{
Console.WriteLine("添加失败，学生信息表已满。");
}
break;
case "2":
stuBLL.Print();
break;
case "3":
Console.Write("请输入要查找的学生的姓名：");
infos = stuBLL.FindByName(Console.ReadLine());
if (infos == null)
{
Console.WriteLine("对不起，您查找的学生不存在。");
}
else
{
stuBLL.PrintHead();
stuBLL.Print(infos);
}
break;
case "4":
Console.Write("请输入要查找的学生的学号：");
infos = stuBLL.FindID(int.Parse(Console.ReadLine()));
if (infos == null)
{
Console.WriteLine("对不起，您查找的学生不存在。");
}
else
{
stuBLL.PrintHead();
stuBLL.Print(infos);
}
break;
case "5":
{ }
break;
case "6":
{ }
break;
case "7":
{ }
break;
case "8":
{ }
break;
case "q":
return;
default:
Console.WriteLine("输入有误，请重新输入。");
break;
}
Console.WriteLine("按任意键继续(q键退出)...");
Console.ReadKey();
}
}
}
}
--------------------编程问答--------------------
using System;
using System.IO;
public class StudentInfo
{
private int id;
private string name;
private float english;
private float math;
public int ID
{
get
{
return this.id;
}
set
{
this.id = value;
}
}
public string Name
{
get
{
return this.name;
}
set
{
this.name = value;
}
}
public float English
{
get
{
return this.english;
}
set
{
this.english = value;
}
}
public float Math
{
get
{
return this.math;
}
set
{
this.math = value;
}
}
public float PJ()
{
return (english + math)/2;
}
}
public class StudentDAL // 学生数据管理类
{
const int MAX = 30;
int count = 0;
StudentInfo[] students = new StudentInfo[MAX];
public StudentInfo[] Students
{
get
{
return students;
}
}
public int Count
{
get
{
return this.count;
}
}
public bool Insert(StudentInfo stu)// 添加一个学生
{
if (Count < MAX)
{
students[this.count] = stu;//插入学生信息
this.count++;
return true;
}
return false;
}
public StudentInfo[] FindID(int id) //通过学号找
{
StudentInfo[] stu = new StudentInfo[MAX];
int count = 0;
for (int i = 0; i < Count; i++)
{
if (students[i].ID == id)
{
stu[count] = students[i];
count++;
}
}
if (count > 0) //找到了
{
StudentInfo[] temp = new StudentInfo[count];
for (int i = 0; i < count; i++)
{
temp[i] = stu[i];
}
return temp;
}
return null;
}
public StudentInfo[] FindByName(string name) //通过姓名找
{
StudentInfo[] stu = new StudentInfo[MAX];
int count = 0;
for (int i = 0; i < Count; i++)
{
if (students[i].Name == name)
{
stu[count] = students[i];
count++;
}
}
if (count > 0)
{
StudentInfo[] temp = new StudentInfo[count]; //有几个相同就把几个加入数组
for (int i = 0; i < count; i++)
{
temp[i] = stu[i];
}
return temp;
}
return null;
}
public class StudentBLL //操作
{
StudentDAL stuDAL = new StudentDAL();
public bool Insert(StudentInfo stu)
{
while (this.FindID(stu.ID) != null)
{
Console.Write("对不起，该学号已存在，请输入一个新的学号：");
stu.ID = int.Parse (Console .ReadLine ());
}
return stuDAL.Insert(stu);
}
public StudentInfo[] FindID(int id)
{
return stuDAL.FindID(id);
}
public StudentInfo[] FindByName(string name)
{
return stuDAL.FindByName(name);
}
public void PrintHead()
{
Console.WriteLine("学号\t姓名\t英语成绩\t数学成绩\t平均成绩");
}
public void Print(StudentInfo stu)
{
Console.WriteLine("{0}\t{1}\t{2}\t\t{3}\t\t{4}", stu.ID, stu.Name, stu.English, stu.Math, stu.PJ());
}
public void Print(StudentInfo[] stus)
{
foreach (StudentInfo stu in stus)
{
this.Print(stu);
}
}
public void Print()
{
if (stuDAL.Count > 0)
{
this.PrintHead();
for (int i = 0; i < stuDAL.Count; i++)
{
this.Print(stuDAL.Students[i]);
}
Console.WriteLine("当前共有{0}名学生。", stuDAL.Count);
}
else
{
Console.WriteLine("对不起，当前还没有学生信息。。。");
}
}
public StudentInfo GenStudentInfo(bool needID)
{
StudentInfo info = new StudentInfo();
if (needID)
{
Console.Write("请输入学生的学号：");
info.ID = int.Parse(Console.ReadLine());
}
Console.Write("请输入学生的姓名：");
info.Name = Console.ReadLine();
Console.Write("请输入学生的英语成绩：");
info.English = float.Parse(Console.ReadLine());
Console.Write("请输入学生的数学成绩");
info.Math = float.Parse(Console.ReadLine());
return info;
}
public StudentInfo GenStudentInfo()
{
return this.GenStudentInfo(true);
}
}
class Program
{
static void Main(string[] args)
{
StudentBLL stuBLL = new StudentBLL();
StudentInfo[] infos;
Console.WriteLine("-------------------学生成绩管理系统-------------------");
while (true)
{
Console.WriteLine("请按键选择您要进行的操作：");
Console.WriteLine("1.添加一个学生 2.查看所有学生信息");
Console.WriteLine("3.通过姓名查找学生 4.通过学号查找学生");
Console.WriteLine("5.英语平均分 6.数学平均分");
Console.WriteLine("7.英语最高分 8.数学最高分");
Console.WriteLine("q.退出程序");
switch (Console.ReadLine())
{
case "1":
if (stuBLL.Insert(stuBLL.GenStudentInfo()))
{
Console.WriteLine("添加成功。");
}
else
{
Console.WriteLine("添加失败，学生信息表已满。");
}
break;
case "2":
stuBLL.Print();
break;
case "3":
Console.Write("请输入要查找的学生的姓名：");
infos = stuBLL.FindByName(Console.ReadLine());
if (infos == null)
{
Console.WriteLine("对不起，您查找的学生不存在。");
}
else
{
stuBLL.PrintHead();
stuBLL.Print(infos);
}
break;
case "4":
Console.Write("请输入要查找的学生的学号：");
infos = stuBLL.FindID(int.Parse(Console.ReadLine()));
if (infos == null)
{
Console.WriteLine("对不起，您查找的学生不存在。");
}
else
{
stuBLL.PrintHead();
stuBLL.Print(infos);
}
break;
case "5":
{ }
break;
case "6":
{ }
break;
case "7":
{ }
break;
case "8":
{ }
break;
case "q":
return;
default:
Console.WriteLine("输入有误，请重新输入。");
break;
}
Console.WriteLine("按任意键继续(q键退出)...");
Console.ReadKey();
}
}
}
}
要下班了，先看下
补充：.NET技术 , C#
