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.

Tags:

Phản hồi từ học viên

5

(Dựa trên đánh giá ngày hôm nay)

Đào Mạnh Dũng [C2010L]
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);
        }
    }
}