using System;

using System.Collections;

class sinhvien{

    string maso,hoten;

    float diemtb;

    static int mucsan =500;

    //khai bao khong tham so

    public sinhvien(){

        maso="";

        hoten="";

        diemtb=0; 

    }

    //khoi tao co tham so   

    public sinhvien(string ma, string ten, float diem){

        maso = ma;

        hoten = ten;

        diemtb = diem;

    }

    public void nhap(){

        Console.WriteLine("Nhap thong tin sinh vien:");

        Console.WriteLine("Nhap ma so:");

        maso=Console.ReadLine();

        Console.WriteLine("Nhap ho ten:");

        hoten=Console.ReadLine();

        Console.WriteLine("Nhap diem trung binh:");

        diemtb=float.Parse(Console.ReadLine());     

    }

    public float tinhtienthuong()

    {

        float tienthuong=0;

                if (diemtb >= 7 && diemtb<8.5)

                    tienthuong=mucsan;

                else if (diemtb >=8.5 && diemtb<=10)

                    tienthuong=mucsan*1.5f;

                return tienthuong;

      }

    // xuat thong tin sinh vien

    public void xuat()

    {

        Console.WriteLine("{0}\t{1}\t{2}\t{3})",maso,hoten,diemtb,tinhtienthuong());

    }

}

//dinh nghia lop danh sach n sinh vien

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}