baitap2

            string name, dichvu = "";
            int sochon , soluong , thanhtien = 0;
            Console.WriteLine("Chao mung cac ban den voi dich vu mmo");
            Console.WriteLine("Vui long cho biet ten cua ban:");
            name = Console.ReadLine();
            Console.WriteLine("Xin chao"+" "+name+" "+"vui long chon loai dich vu ban muon mua");
            Console.WriteLine("Account Hma = 100.000$");
            Console.WriteLine("Account Vip72 = 200.000$");
            Console.WriteLine("Account Sockescort = 300.000$");
            Console.WriteLine("1 = Hma , 2 = Vip 72 , 3 = Sockescort");
            sochon = Convert.ToInt32(Console.ReadLine());
            switch (sochon)
            {
                case 1:
                    Console.WriteLine("Hay nhap so luong account Hma ban muon mua");
                    soluong =Convert.ToInt32(Console.ReadLine());
                    if (soluong ==0)
                    {
                        Console.WriteLine("Hay mua it nhat mot account");
                    }
                    else if( soluong >0 && soluong <=10)
                    {
                        thanhtien = (soluong * 100000) - (soluong * 100000 * 10/100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    else if(soluong >=11 && soluong <=20)
                    {
                        thanhtien = (soluong * 100000) - (soluong * 100000 * 20 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    else
                    {
                        thanhtien = (soluong * 100000) - (soluong * 100000 * 30 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    break;
                case 2:
                    Console.WriteLine("Hay nhap so luong account Vip 72 ban muon mua");
                    soluong = Convert.ToInt32(Console.ReadLine());
                    if (soluong ==0)
                    {
                        Console.WriteLine("Hay mua it nhat mot account");
                    }
                    else if( soluong >0 && soluong <=10)
                    {
                        thanhtien = (soluong * 200000) - (soluong * 200000 * 10 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    else if(soluong >=11 && soluong <=20)
                    {
                        thanhtien = (soluong * 200000) - (soluong * 200000 * 20 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    else
                    {
                        thanhtien = (soluong * 200000) - (soluong * 200000 * 30 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    break;
                case 3:
                    Console.WriteLine("Hay nhap so luong account Sockescort ban muon mua");
                    soluong = Convert.ToInt32(Console.ReadLine());
                    if (soluong ==0)
                    {
                        Console.WriteLine("Hay mua it nhat mot account");
                    }
                    else if( soluong >0 && soluong <=10)
                    {
                        thanhtien = (soluong * 300000) - (soluong * 300000 * 10 / 100);
                        Console.WriteLine("Tong so tien la:"+" "+thanhtien+"$");
                    }
                    else if(soluong >=11 && soluong <=20)
                    {
                        thanhtien = (soluong * 300000) - (soluong * 300000 * 20 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    else
                    {
                        thanhtien = (soluong * 300000) - (soluong * 300000 * 30 / 100);
                        Console.WriteLine("Tong so tien la:" + " " + thanhtien + "$");
                    }
                    break;
            }
            if (thanhtien >= 100000 && thanhtien <=200000)
            {
                Console.WriteLine(name+" "+"se duoc cong them 5 point vao tai khoan");
            }
            else if (thanhtien >200000 && thanhtien <=400000)
            {
                Console.WriteLine(name+" "+"se duoc cong them 10 point vao tai khoan");
            }
            else if (thanhtien > 200000 && thanhtien <= 400000)
            {
                Console.WriteLine(name+" "+"se duoc cong them 15 point vao tai khoan");
            }
            else
            {
                Console.WriteLine(name+" "+"se duoc cong them 20 point vao tai khoan");
            }
            Console.ReadLine();