public HoaDon(string maHoaDon, KhachHang KH, NhanVien NV, MayTinh MT, double PhiSDMT, double thanhTien)
{
this.KH = KH;
this.maHoaDon = maHoaDon;
this.MT = MT;
this.NV = NV;
this.thanhTien = thanhTien;
this.PhiSDMT = PhiSDMT;
}
public MayTinh(MayTinh mt)
{
this.phong = mt.phong;
this.maMT = mt.maMT;
this.loaimaytinh = mt.loaimaytinh;
}