2021-10-15 12:34:52

#StudentMark.cs

using System;

namespace _1433
{
    internal class StudentMark
    {
        private string rollnumber, fullName, classRoom, subject;
        private float point;

        public string Rollnumber
        {
            get
            {
                return rollnumber;
            }
            set
            {
                if (value.Length <= 12 && value.Length >= 6)
                {
                    rollnumber = value;
                }
                else
                {
                    string val;
                    while (true)
                    {
                        Console.WriteLine("Dau vao khong hop le! nhap lai... ");
                        val = Console.ReadLine();
                        if (value.Length <= 12 && value.Length >= 6)
                        {
                            rollnumber = value;
                            return;
                        }
                    }
                }
            }
        }

        public string FullName
        {
            get
            {
                return fullName;
            }
            set
            {
                this.fullName = value;
            }
        }

        public string ClassRoom
        {
            get
            {
                return classRoom;
            }
            set
            {
                classRoom = value;
            }
        }

        public string Subject
        {
            get
            {
                return subject;
            }
            set
            {
                subject = value;
            }
        }

        public float Point
        {
            get
            {
                return point;
            }
            set
            {
                if (value <= 10 && value >= 0)
                {
                    point = value;
                }
                else
                {
                    int val;
                    while (true)
                    {
                        Console.WriteLine("Dau vao khong hop le! nhap lai... ");
                        val = lib.Utility.ReadInt();
                        if (value <= 10 && value >= 0)
                        {
                            point = value;
                            return;
                        }
                    }
                }
            }
        }

        public StudentMark()

        {
        }

        public StudentMark(string rollnumber, string fullName, string classRoom, string subject, int point)
        {
            this.rollnumber = rollnumber;
            this.fullName = fullName;
            this.classRoom = classRoom;
            this.subject = subject;
            this.point = point;
        }

        public void input()
        {
            System.Console.Write("nhap rollnumber : ");
            this.rollnumber = System.Console.ReadLine();
            System.Console.Write("nhap fullName : ");
            this.fullName = System.Console.ReadLine();
            System.Console.Write("nhap classRoom : ");
            this.classRoom = System.Console.ReadLine();
            System.Console.Write("nhap subject : ");
            this.subject = System.Console.ReadLine();
            System.Console.Write("nhap point : ");
            this.point = lib.Utility.ReadInt();
        }

        public void Display()
        {
            System.Console.WriteLine(this);
        }

        public override string ToString()
        {
            return "StudentMark{" + "rollnumber=" + rollnumber + ", fullName=" + fullName + ", classRoom=" + classRoom + ", subject=" + subject + ", point=" + point + '}';
        }

        private static void Main(string[] args)
        {
            StudentMark studentMark1 = new StudentMark();
            StudentMark studentMark2 = new StudentMark();
            studentMark1.input();
            studentMark2.input();
            if (studentMark1.point >= studentMark2.point)
            {
                studentMark1.Display();
            }
            else
            {
                studentMark2.Display();
            }
        }
    }
}

#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 int ReadInt()
        {
            int integer = 0;
            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 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);
            }
        }
    }
}

2021-10-01 08:21:24

#StudentMark.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace StudentMarkManager.Class
{

    class StudentMark
    {
        private string rollNumber;
        public string RollNumber
        {
            get { return rollNumber; }
            set
            {
                //Regex num = new Regex(@"(\d*");
                //RegexOptions.Compiled | RegexOptions.IgnoreCase);

                while (value.Length < 6 || value.Length > 12 || string.IsNullOrWhiteSpace(value) ||
                    !Regex.Match(value, "^[0-9]*$").Success)
                {
                    if (value.Length > 12)
                    {
                        Console.WriteLine("RollNumber exceeds 12 character");
                    }
                    else if (value.Length < 6)
                    {
                        Console.WriteLine("RollNumber below 6 character");
                    } else if (string.IsNullOrWhiteSpace(value))
                    {
                        Console.WriteLine("Don't prank with white spaces");
                    } else if (!Regex.Match(value, "^[0-9]*$").Success)
                    {
                        Console.WriteLine("Roll Number is not complete digits");
                    }
                    string str = Console.ReadLine();
                    value = str.Trim(' ');
                }
                this.rollNumber = value;
            }
        }
        public string Name { get; set; }
        public string Class { get; set; }
        public string Subject { get; set; }
        private float grade;
        public float Grade
        {
            get { return grade; }
            set
            {
                this.grade = value;
            }
        }
        public StudentMark()
        {

        }
        public StudentMark(string RollNumber, string Name, string Class, string Subject, float Grade)
        {
            this.RollNumber = RollNumber;
            this.Name = Name;
            this.Class = Class;
            this.Subject = Subject;
            this.Grade = Grade;
        }

        public void input()
        {
            Console.WriteLine("Enter Roll Number:");
            RollNumber = Console.ReadLine();
            Console.WriteLine("Enter Name:");
            Name = Console.ReadLine();
            Console.WriteLine("Enter Class:");
            Class = Console.ReadLine();
            Console.WriteLine("Enter Subject:");
            Subject = Console.ReadLine();
            Console.WriteLine("Enter Grade:");
            Grade = validGrade(Console.ReadLine());
        }

        public void display()
        {
            Console.WriteLine("\nRoll Number: {0}\nName: {1}\nClass: {2}\nSubject: {3}\nGrade: {4}", RollNumber, Name, Class, Subject, Grade);
        }
        bool check(string str)
        {
            try { float.Parse(str); } catch (Exception) { return false; }
            return true;
        }

        public float validGrade(string str)
        {
            str.Trim(' ');
            check(str);
            while (!check(str) || float.Parse(str) > 10 || float.Parse(str) < 0)
            {
                if (!check(str))
                {
                    Console.WriteLine("Grade is not a valid numeric input");
                }
                else if (float.Parse(str) > 10 || float.Parse(str) < 0)
                {
                    Console.WriteLine("Grade must be between 0 and 10.");
                } 
                str = Console.ReadLine();
            }
            
            return float.Parse(str);
        }

        static void Main(string[] args)
        {
            StudentMark sm = new StudentMark();
            sm.input();
            sm.display();
        }
    }
}

2021-09-30 10:21:05

#Program.cs

using System;

namespace Ss5
{
    class Program
    {
        static void Main(string[] args)
        {
            StudentMark s = new StudentMark();
            s.input();
            s.display();
        }
    }
}

#StudentMark.cs

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

namespace Ss5
{
    class StudentMark
    {
        private string rollnumber;
        public string RollNumBer
        {
            get
            {
                return this.rollnumber;
            }
            set
            {
                while (value.Length < 6 || value.Length > 12)
                {
                    Console.WriteLine("RollNumBer must be length from 6 to 12");
                    Console.WriteLine("Enter RollNumBer again :");
                    value = Console.ReadLine();
                }
                this.rollnumber = value;
            }
        }
        public string FullName { get; set; }
        public string Class { get; set; }
        public string Subject { get; set; }
        private int grade;
        public int Grade
        {
            get
            {
                return this.grade;
            }
            set
            {
                while (value < 0 || value > 10)
                {
                    Console.WriteLine("Grade must be >= 0 and <= 10");
                    Console.WriteLine("Enter Grade Again:");
                    value = int.Parse(Console.ReadLine());
                }
                this.grade = value;
            }
        }
        public StudentMark()
        {

        }
        public StudentMark(string rollnumber, string fullname, string classs, string subject, int grade)
        {
            this.RollNumBer = rollnumber;
            this.FullName = fullname;
            this.Class = classs;
            this.Subject = subject;
            this.Grade = grade;
        }
        public void input()
        {
            Console.WriteLine("Enter RollNumBer :");
            RollNumBer = Console.ReadLine();
            RollNumBer = RollNumBer.Trim();

            Console.WriteLine("Enter FullName :");
            FullName = Console.ReadLine();
            FullName = validFullName(FullName);

            Console.WriteLine("Enter Class :");
            Class = Console.ReadLine();
            Class = validClass(Class);

            Console.WriteLine("Enter Subject :");
            Subject = Console.ReadLine();
            Subject = validSubject(Subject);

            Console.WriteLine("Enter Grade :");
            string grade = Console.ReadLine();
            Grade = validGrade(grade);

        }
        public void display()
        {
            Console.WriteLine("RollNumBer :{0}, FullName :{1}, Class :{2}, Subject :{3}, Grade :{4}", RollNumBer, FullName, Class, Subject, Grade);
        }
        static bool IsNumeric(string value)
        {
            try
            {
                int number;
                int.Parse(value);
            }

            catch (Exception ex) { return false; }
            return true;
        }
        public string validFullName(string FullName)
        {
            while (string.IsNullOrWhiteSpace(FullName))
            {
                Console.WriteLine("FullName cannot empty ");
                Console.WriteLine("Enter FullName Again :");
                FullName = Console.ReadLine();

            }
            FullName = FullName.Trim();
            return FullName;
        }
        public string validClass(string Class)
        {
            while (string.IsNullOrWhiteSpace(Class))
            {
                Console.WriteLine("Class cannot empty ");
                Console.WriteLine("Enter Class Again :");
                Class = Console.ReadLine();
            }
            Class = Class.Trim();
            return Class;
        }
        public string validSubject(string Subject)
        {
            while (string.IsNullOrWhiteSpace(Subject))
            {
                Console.WriteLine("Subject cannot empty ");
                Console.WriteLine("Enter Subject Again :");
                Subject = Console.ReadLine();
            }
            Subject = Subject.Trim();
            return Subject;
        }
        public int validGrade(string grade)
        {
            int Grade;
            while (string.IsNullOrWhiteSpace(grade) || !IsNumeric(grade))
            {
                if (string.IsNullOrWhiteSpace(grade))
                {
                    Console.WriteLine("Grade cannot empty ");
                    Console.WriteLine("Enter Grade Again :");
                }
                else if (!IsNumeric(grade))
                {
                    Console.WriteLine("Grade must be number ");
                    Console.WriteLine("Enter Grade Again :");
                }
                grade = Console.ReadLine();

            }
            grade = grade.Trim();
            Grade = int.Parse(grade);
            return Grade;
        }
    }

}

2021-05-18 15:59:00

#StudentMark.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace StudentMarkHomeWork.studentMark
{
    class StudentMark
    {
        private string rollNo;
        public string RollNo
        {
            get{
                return rollNo;
            }
            set
            {
                if(value.Length < 6 && value.Length > 12)
                {
                    Console.WriteLine("Khong hop le!!");
                }
                else
                {
                    rollNo = value;
                }
            }
        }
        string name, Class, subject;
        private float mark;
        public float Mark
        {
            get
            {
                return mark;
            }
            set
            {
                if (value < 0 && value > 10)
                {
                    Console.WriteLine("Khong hop le!!");
                }
                else
                {
                    mark = value;
                }
            }
        }
        public StudentMark()
        {

        }
        public StudentMark(string rollNo, string name, string Class, string subject, float mark)
        {
           if(rollNo.Length < 6 || rollNo.Length > 12)
            {
                Console.WriteLine("Khong hop le!!");
            }
            else
            {
                this.rollNo = rollNo;
            }
            this.name = name;
            this.Class = Class;
            this.subject = subject;
            if(mark < 0 || mark > 10)
            {
                Console.WriteLine("Khong hop le!!");
            }
            else
            {
                this.mark = mark;
            }
        }
        public void input()
        {
            Console.WriteLine("Nhap ma sinh vien:");
            while (true)
            {
                rollNo = Console.ReadLine();
                if (rollNo.Length < 6 || rollNo.Length > 12)
                {
                    Console.WriteLine("Khong hop le!!");
                }
                else break;
            }
            Console.WriteLine("Nhap ten sinh vien:");
            name = Console.ReadLine();
            Console.WriteLine("Nhap ten lop:");
            Class = Console.ReadLine();
            Console.WriteLine("Nhap diem thi:");
            while (true)
            {
                mark = float.Parse(Console.ReadLine());
                if (mark < 0 || mark > 10)
                {
                    Console.WriteLine("Khong hop le!!");
                }
                else break;
            }
        }
        public void display()
        {
            Console.WriteLine("Ma sinh vien: {0}", rollNo);
            Console.WriteLine("Ten sinh vien: {0}", name);
            Console.WriteLine("Ten lop: {0}", Class);
            Console.WriteLine("Diem thi: {0}", mark);
        }
    }
}

#Test.cs

using System;
using StudentMarkHomeWork.studentMark;

namespace StudentMarkHomeWork.test
{
    class Test
    {
        static void Main(string[] args)
        {
            StudentMark std1 = new StudentMark();
            StudentMark std2 = new StudentMark();
            std1.input();
            std2.input();
            std1.display();
            std2.display();
            Console.WriteLine("Thi sinh co diem cao nhat la:");
            if(std1.Mark > std2.Mark)
            {
                std1.display();
            }
            else
            {
                std2.display();
            }
        }
    }
}

2021-05-18 04:47:55

using System;
using System.Collections.Generic;

namespace Lesson2.StudentMark
{
    class Student
    {
        public string Roolno { get; set; }
        public string Name { get; set; }
        public string Class { get; set; }

        public string Subject { get; set; }
       private int _Mark;
        public int Mark
        {
            get
            {
                return _Mark;
            }
            set
            {
                if(value<0 || value > 10)
                {
                    Console.WriteLine("Nhap diem thi sai");
                }
                else
                {
                    _Mark = value;
                }
            }
        }

        public void Input()
        {
            Console.WriteLine("Nhap ma hoc sinh:");
            Roolno = Console.ReadLine();
            Console.WriteLine("Nhap ten hoc sinh:");
            Name = Console.ReadLine();
            Console.WriteLine("Nhap lop hoc sinh:");
            Class = Console.ReadLine();
            Console.WriteLine("Nhap mon hoc:");
            Subject = Console.ReadLine();
            Console.WriteLine("Nhap diem mon hoc:");
            Mark = Int32.Parse(Console.ReadLine());

        }
        public void Display()
        {
            Console.WriteLine("Ma: {0}, Ten: {1}, Lop: {2}, Mon hoc: {3}, Diem: {4} ", Roolno, Name, Class, Subject, Mark);
        }

        static void Main(string[] args)
        {
            List<Student> StudenList = new List<Student>();
            Console.WriteLine("Nhap so luong hoc sinh can them");
            int N = Int32.Parse(Console.ReadLine());

            int MaxIndex = 0;
            int MaxMark = 0;
            for(int i = 0; i < N; i++)
            {
                Student student = new Student();
                student.Input();
                StudenList.Add(student);

                if(StudenList[i].Mark >= MaxMark)
                {
                    MaxIndex = i;
                }
            }

            Console.WriteLine("Thong tin hoc sinh co diem cao nhat nhu sau:");
            StudenList[MaxIndex].Display();
        }
    }
}

2021-05-18 02:49:56

using System;

namespace diemthi
{
    class Program
    {
        static void Main(string[] args)
        {
            StudentMark std1 = new StudentMark();
            std1.Nhap();
            StudentMark std2 = new StudentMark();
            std2.Nhap();
            std1.hienthi();
            std2.hienthi();
            if (std1.diem > std2.diem)
            {
                Console.WriteLine("Sinh vien co diem lon nhat la");
                std1.hienthi();
            }
            else if (std1.diem < std2.diem)
            {
                Console.WriteLine("Sinh vien co diem lon nhat la");
                std2.hienthi();
            }
            else {
                Console.WriteLine(" 2 sinh vien co diem bang nhau: ");
                std1.hienthi();
                std2.hienthi();
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace diemthi
{
    public class StudentMark
    {
        public String rollnumber;
        public String ten;
        public String lop;
        public String mon;
        public float diem;

        public StudentMark() { }
        public StudentMark(String rollnumber, String ten, String lop, String mon, float diem)
        {
            this.rollnumber = rollnumber;
            this.ten = ten;
            this.lop = lop;
            this.mon = mon;
            this.diem = diem;
        }
        public String Rollnumber { get; set; }
        public String Ten { get; set; }
        public String Lop { get; set; }
        public String Mon { get; set; }
        public float Diem { get; set; }

        public void Nhap()
        {
            Console.WriteLine("Nhap ma sinh vien: ");
            rollnumber = Console.ReadLine();
            if (rollnumber.Length > 12) { 
                Console.WriteLine(rollnumber.Length);
                    Console.WriteLine("Nhap lai ma sinh vien it hon 12 ki tu");
                    rollnumber = Console.ReadLine();
            }
            else { 
            Console.WriteLine("Nhap ten sinh vien: ");
            ten = Console.ReadLine();
            Console.WriteLine("Nhap lop ");
            lop = Console.ReadLine();
            Console.WriteLine("Nhap mon");
            mon = Console.ReadLine();
            Console.WriteLine("Nhap diem");
            diem = float.Parse(Console.ReadLine());
            if ( diem > 10){
                    Console.WriteLine("Nhap lai diem thi tu (0 -> 10)");
                    diem = Int32.Parse(Console.ReadLine());
            }}
        }
        public void hienthi(){
            Console.WriteLine(rollnumber + " , " + ten + " , " + lop + " , " + mon + " , " + diem + " : ");
        }
    }
}

2021-05-18 01:27:25

using System;

namespace bai1433
{
    class StudentMark
    {
        public string Rollnumber { get; set; }
        public string fullname { get; set; }
        public string classname { get; set; }
        public string subject { get; set; }
        private int _mark;
        public int mark
        {
            //private get
            get
            {
                return _mark;
            }

            //private set
            set
            {
                if (value <= 0 && value >= 10)
                {
                    Console.WriteLine("Diem phai tu 1 den 10");
                }
                else
                {
                    _mark = value;
                }
            }
        }

        public StudentMark()
        {

        }

        public StudentMark(string Rollnumber, string fullname, string classname, string subject, int mark)
        {
            this.Rollnumber = Rollnumber;
            this.fullname = fullname;
            this.classname = classname;
            this.subject = subject;
            this.mark = mark;
        }

        public void input()
        {
            Console.WriteLine("Nhap rollnumber: ");
            Rollnumber = Console.ReadLine();

            Console.WriteLine("Nhap fullname: ");
            fullname = Console.ReadLine();

            Console.WriteLine("Nhap classname: ");
            classname = Console.ReadLine();

            Console.WriteLine("Nhap subject: ");
            subject = Console.ReadLine();

            Console.WriteLine("Nhap mark: ");
            mark = Convert.ToInt32(Console.ReadLine());
        }

        public void display()
        {
            Console.WriteLine("Rollnumber: " + Rollnumber);
            Console.WriteLine("fullname: " + fullname);
            Console.WriteLine("classname: " + classname);
            Console.WriteLine("subject: " + subject);
            Console.WriteLine("mark: " + mark);

        }


        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            StudentMark stdm1 = new StudentMark();
            StudentMark stdm2 = new StudentMark();

            Console.WriteLine("Nhap thong tin sinh vien thu 1: ");
            stdm1.input();

            Console.WriteLine("Nhap thong tin sinh vien thu 2: ");
            stdm2.input();

            Console.WriteLine("Thong tin sinh vien thu 1: ");
            stdm1.display();

            Console.WriteLine("Thong tin sinh vien thu 2: ");
            stdm2.display();

            Console.WriteLine("Sinh vien co diem cao hon la: ");
            if(stdm1.mark > stdm2.mark)
            {
                stdm1.display();
            } else
            {
                stdm2.display();
            }

        }

    }
    
}

2021-05-17 09:20:19

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices.ComTypes;

namespace StudentMark
{
    class Program
    {
        static void Main(string[] args)
        {
            Diemthi t = new Diemthi();
            t.input();
            t.display();
            Diemthi t1 = new Diemthi("8", "nguyendinhquan", "T2008A", "laptrinhC#", 9);
            Console.WriteLine("Nguoi co diem cao nhat");
            if(t.Score > t1.Score)
            {
                t.display();
                return;
            }
            if(t.Score == t1.Score)
            {
                t1.display();
                t.display();
                return;
            }
            t1.display();
            
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace StudentMark
{
    class Diemthi
    {
        public string RollNumber { get; set; }
        public string FullName { get; set; }
        public string NameClass { get; set; }
        public string NameSubjects { get; set; }

        public int Score { get; set; }

        public Diemthi() { }
        public Diemthi(string rollnumber,string fullname,string nameClass,string nameSubjects,int score)
        {
            RollNumber = rollnumber;
            FullName = fullname;
            NameClass = nameClass;
            NameSubjects = nameSubjects;
            Score = score;
        }
        public void display()
        {
            Console.WriteLine("Rollnumber = {0}, Fullname = {1}, NameClass= {2}, NameSubject = {3}, Score ={4}",
                RollNumber,FullName,NameClass,NameSubjects,Score);    
        }
        public void input()
        {

            checkRoll();
            Console.WriteLine("nhap fullname");
            FullName = Console.ReadLine();
            Console.WriteLine("nhap nameClass");
            NameClass = Console.ReadLine();
            Console.WriteLine("nhap nameSubject");
            NameSubjects = Console.ReadLine();
            checkScore();
        }

        public void checkRoll()
        {
            bool isCheck = true;
            while(isCheck)
            {
                Console.WriteLine("Nhap rollnumber");
                string data = Console.ReadLine();
                if(5 <data.Length && data.Length < 13)
                {
                    RollNumber = data;
                    isCheck = false;
                    return;
                }
                Console.WriteLine("Nhap rollnumber tu 6-12");
            } 
            
        }
 
        public void checkScore()
        {
            bool isCheck = true;
            while (isCheck)
            {
                Console.WriteLine("Nhap Score");
                int data = Convert.ToInt32(Console.ReadLine());
                if (data >=0 && data <= 10)
                {
                    Score = Convert.ToInt32(data);
                    isCheck = false;
                    return;
                }
                Console.WriteLine("Nhap Score tu 0-10");
            }

        }
    }
}

2021-05-17 08:54:04

using System;

namespace BaiTap01
{
    class StudentMark
    {
        public string rollno { get; set; }
        public string fullname { get; set; }
        public string className { get; set; }
        public string subject { get; set; }
        public float mark { get; set; }

        public StudentMark() { }

        public StudentMark(string rollno, string fullname, string className, string subject, float mark)
        {
            this.rollno = rollno;
            this.fullname = fullname;
            this.className = className;
            this.subject = subject;
            this.mark = mark;
        }

        public void Input()
        {
            Console.WriteLine("Nhap rollno: ");
            rollno = Console.ReadLine();

            Console.WriteLine("Nhap fullname: ");
            fullname = Console.ReadLine();

            Console.WriteLine("Nhap className: ");
            className = Console.ReadLine();

            Console.WriteLine("Nhap subject: ");
            subject = Console.ReadLine();

            Console.WriteLine("Nhap mark: ");
            mark = float.Parse(Console.ReadLine());
        }

        public void Show()
        {
            Console.WriteLine("rollno = {0}, fullname = {1}, className = {2}, subject = {3}, mark = {4}", rollno, fullname, className, subject, mark);
        }

        static void Main(string[] args)
        {
            StudentMark studentMark1 = new StudentMark();
            StudentMark studentMark2 = new StudentMark();

            studentMark1.Input();
            studentMark2.Input();

            studentMark1.Show();
            studentMark2.Show();

            if (studentMark1.mark > studentMark2.mark)
            {
                studentMark1.Show();
            } else if (studentMark1.mark == studentMark2.mark)
            {
                Console.WriteLine("2 sv = diem");
            } else
            {
                studentMark2.Show();
            }
        }
    }
}

2020-06-04 16:18:08

#Program.cs

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices.ComTypes;

namespace Lessson4
{
    class Program
    {
        static void Main(string[] args)
        {
            Diemthi t = new Diemthi();
            t.input();
            t.display();
            Diemthi t1 = new Diemthi("ab0001", "smile", "T1907A", "laptrinh", 9);
            Console.WriteLine("Nguoi co diem cao nhat");
            if(t.Score > t1.Score)
            {
                t.display();
                return;
            }
            if(t.Score == t1.Score)
            {
                t1.display();
                t.display();
                return;
            }
            t1.display();
            
        }
    }
}

#Employee.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Lessson4
{
    class Employee
    {
        string hoten;
        string _gender;
        string address;
        string chucvu;
        float luong;
        public string Hoten { get; set; }
        //enum gender
        public enum GioiTinh { Nam, Nu, KhongXacDinh};
        public GioiTinh Gender { get; set; }

       
        public string Address { get; set; }
        public string ChucVu { get; set; }
        public float Luong { get; set; }

        public Employee() { }
        public Employee(string hoten, GioiTinh gender, string address, string chucvu, float luong)
        {
            Hoten = hoten;
            Gender = gender;
            Address = address;
            ChucVu = chucvu;
            Luong = luong;
        }

        public void display()
        {
            Console.WriteLine("Hoten={0},Gender = {1},Address = {2},Chuc vu ={3},Luong ={4}",
                Hoten, Gender, Address, ChucVu, Luong);
        }
        public void input()
        {
            Console.WriteLine("Nhap hoten");
            Hoten = Console.ReadLine();
            Console.WriteLine("Nhap gender");
            checkGender();
            Console.WriteLine("Nhap address");
            Address = Console.ReadLine();
            Console.WriteLine("nhap Chuc Vu");
            ChucVu = Console.ReadLine();
            Console.WriteLine("Nhap luong");
            Luong = float.Parse(Console.ReadLine());
        }



        public void checkGender()
        {
            int choose;
            do
            {
                Console.WriteLine("0: Nam");
                Console.WriteLine("1: Nu");
                Console.WriteLine("2: Khong Xac Dinh");
                Console.WriteLine("Choose:");
                choose = Convert.ToInt32(Console.ReadLine());
                
                switch (choose)
                {
                    case 0:
                        Gender = GioiTinh.Nam;
                       // Console.WriteLine(Gender);
                        break;
                    case 1:
                        Gender = GioiTinh.Nu;
                        //Console.WriteLine(Gender);
                        break;
                    case 2:
                        Gender = GioiTinh.KhongXacDinh;
                        //Console.WriteLine(Gender);
                        break;

                }
            } while (choose > 2 || choose < 0);

        }
        }
    }

#diemthi.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Lessson4
{
    class Diemthi
    {
        public string RollNumber { get; set; }
        public string FullName { get; set; }
        public string NameClass { get; set; }
        public string NameSubjects { get; set; }

        public int Score { get; set; }

        public Diemthi() { }
        public Diemthi(string rollnumber,string fullname,string nameClass,string nameSubjects,int score)
        {
            RollNumber = rollnumber;
            FullName = fullname;
            NameClass = nameClass;
            NameSubjects = nameSubjects;
            Score = score;
        }
        public void display()
        {
            Console.WriteLine("Rollnumber = {0}, Fullname = {1}, NameClass= {2}, NameSubject = {3}, Score ={4}",
                RollNumber,FullName,NameClass,NameSubjects,Score);    
        }
        public void input()
        {

            checkRoll();
            Console.WriteLine("nhap fullname");
            FullName = Console.ReadLine();
            Console.WriteLine("nhap nameClass");
            NameClass = Console.ReadLine();
            Console.WriteLine("nhap nameSubject");
            NameSubjects = Console.ReadLine();
            checkScore();
        }

        public void checkRoll()
        {
            bool isCheck = true;
            while(isCheck)
            {
                Console.WriteLine("Nhap rollnumber");
                string data = Console.ReadLine();
                if(5 <data.Length && data.Length < 13)
                {
                    RollNumber = data;
                    isCheck = false;
                    return;
                }
                Console.WriteLine("Nhap rollnumber tu 6-12");
            } 
            
        }

        //
        public void checkScore()
        {
            bool isCheck = true;
            while (isCheck)
            {
                Console.WriteLine("Nhap Score");
                int data = Convert.ToInt32(Console.ReadLine());
                if (data >=0 && data <= 10)
                {
                    Score = Convert.ToInt32(data);
                    isCheck = false;
                    return;
                }
                Console.WriteLine("Nhap Score tu 0-10");
            }

        }
    }
}

#Product.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Lessson4
{
    class Product
    {
        private string maHH;
        private string tenHH;
        private float soLuong;
        private float gia1Sp;

        
        public string MaHH { get; set; }
        public string TenHH { get; set; }
        public float SoLuong { get; set; }
        public float Gia1Sp { get; set; }

        public Product() {}
        public Product(string maHH,string tenHH,float soLuong,float gia1Sp) 
        {
            MaHH = maHH;
            TenHH = tenHH;
            SoLuong = soLuong;
            Gia1Sp = gia1Sp;
        }
        public void display()
        {
            Console.WriteLine("maHH = {0} || tenHH = {1} || soluong = {2} || gia1Sp = {3}",
                maHH, TenHH, SoLuong, Gia1Sp);
        }
        public void input()
        {
            Console.WriteLine("Nhap maHH");
            MaHH = Console.ReadLine();
            Console.WriteLine("Nhap tenHH");
            TenHH = Console.ReadLine();
            Console.WriteLine("Nhap soLuong");
            SoLuong = float.Parse(Console.ReadLine());
            Console.WriteLine("Nhap gia1Sp");
            Gia1Sp = float.Parse(Console.ReadLine());
        }

    }
}