using System;

​

namespace PS12947_LAB5

{

    abstract class sinhvien

    {

        public string HoTen;

        public string Nganh;

        public sinhvien() { }

        public sinhvien(string HoTen, string Nganh)

        {

            this.HoTen = HoTen;

            this.Nganh = Nganh;

        }

​

        abstract public double getDiem();

        public string getHocLuc()

        {

            if (this.getDiem() < 5) return "Yeu";

            else if (this.getDiem() < 6.5) return "Trung Binh";

            else if (this.getDiem() < 7.5) return "Kha";

            else if (this.getDiem() < 9) return "Gioi";

            else return "Xuat sac";

        }

        public void xuat()

        {

            Console.WriteLine("HoTen: {0} Nganh: {1} Diem: {2}  HocLuc: {3}", HoTen, Nganh, getDiem(), getHocLuc());

        }

    }

}