By GokiSoft.com|
19:58 21/10/2021|
C Sharp
Bài tập - Quản lý điểm thi Aptech bằng C# - Lập trình C Sharp
1. Create interface IMark in package named aptech has two methods:
public void input()
public void display()
2. Create a class named StudentAptech in package aptech implements interface IMark and adding follow attributes:
private String StuId;
private String StuName;
private String gender;
private String birthday;
private String nativePlace;
Create two constructors for this class.
Create method sets/gets for these attributes.
Override methods in the interface that it inherited.
3. Create class named StudentMark in package aptech.mark implements interface IMark and adding follow attributes:
private String StuId;
private String className;
private String subjectName;
private int semester;
private float mark;
Create two constructors for this class.
Create method sets/gets for these attributes.
Override methods in the interface that it inherits.
4. Create class named StudentMarkTotal in package aptech.mark inherits class IMark and adding follow attributes:
private String StuId;
private int totalExamSubject;
private float everageMark;
Create two constructors for this class.
Create method sets/gets for these attributes.
Override methods in the class that it inherited.
Construct adding method:
public void getTotalExamSubject(ArrayList<StudentMark> list); //Tính tổng số môn thi
public void calculateEverageMark(ArrayList<StudentMark> list); //Tính điểm trung bình các môn thi
5. Create class Manager in package aptech.mark has follow menu:
1. Input n information of Aptech’s student.
2. Input m exam marks for these students
3. Sort by Student’s name and display the list.
4. Find information of exam marks by student’s id
5. Exit
Note:
The list of n Students are declared from the StudentAptech class.
The list of n exam marks are declared from StudentMark class.
When you input exam mark for student, you must check the StuId is existed in the list of Student’s information.
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Phản hồi từ học viên
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![Đào Mạnh Dũng [C2010L]](https://www.gravatar.com/avatar/6a111fa53fd75dc87034660a8857df16.jpg?s=80&d=mm&r=g){kind=avatar}
Đào Mạnh Dũng
2021-10-22 14:25:49
#IMark.cs
using System;
using System.Collections.Generic;
using System.Text;
namespace _2499
{
interface IMark
{
public void input();
public void display();
}
}
#Manager.cs
using lib;
using System;
using System.Collections.Generic;
namespace _2499
{
internal class Manager
{
public static List<StudentAptech> studentApteches = new List<StudentAptech>();
private static List<StudentMark> studentMarks = new List<StudentMark>();
private static void Main(string[] args)
{
SwitchCase[] menu = { ShowMenu, InputStudentAptech, InputStudentMark, Sort, Find, Utility.Exist };
Utility.Menu(menu);
}
private static void InputStudentAptech()
{
Console.WriteLine("nhap n ");
int n = Utility.ReadInt();
for (int i = 0; i < n; i++)
{
StudentAptech studentAptech = new StudentAptech();
Console.WriteLine("=====================");
studentAptech.input();
studentApteches.Add(studentAptech);
}
}
private static void InputStudentMark()
{
Console.WriteLine("nhap n ");
int n = Utility.ReadInt();
for (int i = 0; i < n; i++)
{
StudentMark studentMark = new StudentMark();
Console.WriteLine("=====================");
studentMark.input();
studentMarks.Add(studentMark);
}
}
private static void Sort()
{
studentApteches.Sort((s1, s2) => s1.StuName.CompareTo(s2.StuName));
foreach (var item in studentApteches)
{
item.display();
}
}
private static void Find()
{
Console.WriteLine("nhap StuId");
string StuId = Console.ReadLine();
foreach (var item in studentMarks)
{
if (item.StuId.Equals(StuId))
{
Console.WriteLine("===========");
Console.WriteLine(item);
}
}
}
private static void ShowMenu()
{
Console.WriteLine("1. Input n information of Aptech’s student.\n" +
"\n" +
"2. Input m exam marks for these students\n" +
"\n" +
"3. Sort by Student’s name and display the list.\n" +
"\n" +
"4. Find information of exam marks by student’s id\n" +
"\n" +
"5. Exit");
}
}
}#StudentAptech.cs
using System;
namespace _2499
{
internal class StudentAptech : IMark
{
public string StuId { get; set; }
public string StuName { get; set; }
public string gender { get; set; }
public string birthday { get; set; }
public string nativePlace { get; set; }
public StudentAptech()
{
}
public StudentAptech(string stuId, string stuName, string gender, string birthday, string nativePlace)
{
StuId = stuId;
StuName = stuName;
this.gender = gender;
this.birthday = birthday;
this.nativePlace = nativePlace;
}
public void display()
{
Console.WriteLine(this);
}
public void input()
{
Console.WriteLine("nhap StuId");
StuId = Console.ReadLine();
Console.WriteLine("nhap StuName");
StuName = Console.ReadLine();
Console.WriteLine("nhap gender");
this.gender = Console.ReadLine();
Console.WriteLine("nhap birthday");
this.birthday = Console.ReadLine();
Console.WriteLine("nhap nativePlace");
this.nativePlace = Console.ReadLine();
}
public override string ToString()
{
return "StudentAptech{" + "StuId=" + StuId + ", StuName=" + StuName + ", gender=" + gender + ", birthday=" + birthday + ", nativePlace=" + nativePlace + '}';
}
}
}#StudentMark.cs
using System;
namespace _2499
{
internal class StudentMark : IMark
{
private string stuId;
public string StuId
{
get
{
return stuId;
}
set
{
if (Manager.studentApteches.Exists(item => item.StuId.Equals(value)))
{
stuId = value;
}
else
{
while (true)
{
Console.WriteLine("StuId khong ton tai nhap lai");
string val = Console.ReadLine();
if (Manager.studentApteches.Exists(item => item.StuId.Equals(val)))
{
stuId = val;
return;
}
}
}
}
}
public string className { get; set; }
public string subjectName { get; set; }
public int semester { get; set; }
public float mark { get; set; }
public StudentMark()
{
}
public StudentMark(string stuId, string className, string subjectName, int semester, float mark)
{
StuId = stuId;
this.className = className;
this.subjectName = subjectName;
this.semester = semester;
this.mark = mark;
}
public void display()
{
Console.WriteLine(this);
}
public void input()
{
Console.WriteLine("nhap StuId");
StuId = Console.ReadLine();
Console.WriteLine("nhap className");
this.className = Console.ReadLine();
Console.WriteLine("nhap subjectName");
this.subjectName = Console.ReadLine();
Console.WriteLine("nhap semester");
this.semester = lib.Utility.ReadInt();
Console.WriteLine("nhap mark");
this.mark = lib.Utility.ReadFloat();
}
public override string ToString()
{
return "StudentMark{" + "StuId=" + StuId + ", className=" + className + ", subjectName=" + subjectName + ", semester=" + semester + ", mark=" + mark + '}';
}
}
}#StudentMarkTotal.cs
using System;
using System.Collections.Generic;
namespace _2499
{
internal class StudentMarkTotal : IMark
{
public string StuId { get; set; }
public int totalExamSubject { get; set; }
public float everageMark { get; set; }
public StudentMarkTotal()
{
}
public StudentMarkTotal(string stuId, int totalExamSubject, float everageMark)
{
StuId = stuId;
this.totalExamSubject = totalExamSubject;
this.everageMark = everageMark;
}
public void display()
{
Console.WriteLine(this);
}
public void input()
{
Console.WriteLine("nhap StuId");
StuId = Console.ReadLine();
Console.WriteLine("nhap totalExamSubject");
this.totalExamSubject = lib.Utility.ReadInt();
Console.WriteLine("nhap everageMark");
this.everageMark = lib.Utility.ReadFloat();
}
public override string ToString()
{
return "StudentMarkTotal{" + "StuId=" + StuId + ", totalExamSubject=" + totalExamSubject + ", everageMark=" + everageMark + '}';
}
public void getTotalExamSubject(List<StudentMark> list)
{
Dictionary<string, bool> Subject = new Dictionary<string, bool>();
foreach (var item in list)
{
if (!Subject.ContainsKey(item.subjectName))
{
Subject.Add(item.subjectName, true);
}
}
this.totalExamSubject = Subject.Count;
}
public void calculateEverageMark(List<StudentMark> list)
{
float everageMark = 0;
foreach (var item in list)
{
everageMark += item.mark;
}
this.everageMark = everageMark / list.Count;
}
}
}#Utility.cs
using Newtonsoft.Json;
using System;
using System.IO;
namespace lib
{
internal delegate void SwitchCase();
internal class Utility
{
public static void Menu(SwitchCase[] menu)
{
int choose;
while (true)
{
menu[0]();
choose = Utility.ReadInt();
if (choose <= menu.Length)
{
menu[choose]();
}
else Console.WriteLine("Dau vao khong hop le! ");
}
}
public static void Exist()
{
Environment.Exit(0);
}
public static int ReadInt()
{
int integer;
while (true)
{
try
{
integer = int.Parse(Console.ReadLine());
break;
}
catch (Exception)
{
Console.Write("du lieu dau vao khong hop le, nhap lai : ");
}
}
return integer;
}
public static float ReadFloat()
{
float _float;
while (true)
{
try
{
_float = float.Parse(System.Console.ReadLine());
break;
}
catch (Exception)
{
Console.Write("du lieu dau vao khong hop le, nhap lai : ");
}
}
return _float;
}
public static DateTime ReadDate()
{
DateTime date;
while (true)
{
try
{
date = ConvertDateTime(Console.ReadLine());
break;
}
catch (Exception)
{
Console.Write("du lieu dau vao khong hop le, nhap lai : ");
}
}
return date;
}
public static string ConvertDateTime(DateTime myDate)
{
return myDate.ToString("dd-MM-yyyy");
}
public static DateTime ConvertDateTime(string str)
{
return DateTime.ParseExact(str, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);
}
public static T ReadfileJson<T>(string path)
{
return JsonConvert.DeserializeObject<T>(System.IO.File.ReadAllText(path));
}
public static void SavefileJson(object obj, string path)
{
System.IO.File.WriteAllText(path, JsonConvert.SerializeObject(obj));
Console.WriteLine("save file json is success!");
}
public static void SaveObject(object serialize, string path)
{
using (Stream stream = File.Open(path, FileMode.Create))
{
new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter().Serialize(stream, serialize);
Console.WriteLine("save file object is success!");
}
}
public static object ReadObject(string path)
{
using (Stream stream = File.Open(path, FileMode.Open))
{
return new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter().Deserialize(stream);
}
}
public static void directoryCreate(string path)
{
string directoryPath = path;
DirectoryInfo directory = new DirectoryInfo(directoryPath);
if (!directory.Exists)
{
directory.Create();
}
Console.WriteLine("Create directory {0} is success!", directory.Name);
}
}
}
