using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApp1

{

    class Student

    {

        private

            string name;

            string MSSV;

            int age;

            bool gender;

       public  Student(string name,string MSSV,int age,bool gender)

        {

            this.name = name;

            this.MSSV = MSSV;

            this.age = age;

            this.gender = gender;

        }

        public 

            void nhap()

            {

            Console.Write("Nhap ten sv: ");

            this.name = Console.ReadLine();

            Console.Write("Nhap ma so sv: ");

            this.MSSV = Console.ReadLine();

            Console.Write("Nhap tuoi: ");

            this.age = Convert.ToInt32( Console.ReadLine());

            Console.Write("Nhap gioi tinh: ");

            this.gender= Convert.ToBoolean(Console.ReadLine());

        }

        public void xuat()

        {

            Console.WriteLine("Ten sv: " +this.name);

            Console.WriteLine("MSSV: " + this.MSSV);

            Console.WriteLine("Tuoi: " + this.age);

            if (this.gender)

                Console.WriteLine("Gioi tinh: Nam");

            else

                Console.WriteLine("Gioi tinh: Nu");

        }

}

    class List

    {

        private

            Student[] SV;

            int Max;

        //List( Student[] SV,int Max)

        //{

        //  this.SV = SV;

        //  this.Max = 50;

        //}

        static int Siso=0;

        public List(int n)

        {

            this.SV = new Student[n];

            Max = 50;

        }

         public void add(Student addSV)

           {

            for(int i=0;i<SV.Length;i++)

                if(SV[i]==null)

                   this.SV[i] = addSV;

            Siso++;

        }

        public void show()

        {

            foreach(Student i in SV)

            {

                i.xuat();

            }

        }

        public void search()

        {

            Console.WriteLine("Nhap mssv can tim kiem");

            string mssv = Console.ReadLine();

            foreach (Student i in SV)

            {

            }

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("nhap so sv: ");

            int n = Convert.ToInt32(Console.ReadLine());

            List DSSV = new List(n);

            Student sv0 = new Student("Vo Hong Phong", "1", 20, true);

            Student sv1 = new Student("Hung oc cho", "1", 20, false);

            Student sv2 = new Student("Nguyen Van A", "1", 20, true);

            Student sv3 = new Student("Vo Hong Phong", "1", 20, true);

            DSSV.add(sv0);

            DSSV.add(sv0);

            DSSV.add(sv0);

            DSSV.add(sv0);

            DSSV.show();

​

            Console.ReadKey();

        }

    }

}