public void KhoiTaoDaThuc()
 {
     for (int i = 0; i < this.soLuongDonThuc; i++)
     {
         DonThuc mDonThuc = this[i];
         mDonThuc.soMuN = i;
         Console.Write("Vui long nhap he so a tai don thuc thu " + i + " :");
         mDonThuc.heSoA = double.Parse(Console.ReadLine());
     }
 }
        public DaThuc(int soLuongDonThuc)
        {
            mangDonThuc         = new DonThuc[soLuongDonThuc];
            this.soLuongDonThuc = soLuongDonThuc;

            // Khoi tao cac don thuc trong da thuc
            for (int i = 0; i < this.soLuongDonThuc; i++)
            {
                this[i] = new DonThuc(1, i);
            }
        }
 public void prettyPrint()
 {
     Console.WriteLine("In da thuc:");
     for (int i = 0; i < this.soLuongDonThuc; i++)
     {
         DonThuc mDonThuc = this[i];
         Console.Write(mDonThuc.heSoA + "*" + "x^" + mDonThuc.soMuN);
         if (i != this.soLuongDonThuc - 1)
         {
             Console.Write("+");
         }
     }
     Console.WriteLine();
 }
 public DaThuc()
 {
     mangDonThuc    = new DonThuc[1];
     mangDonThuc[0] = new DonThuc();
 }