static void Main(string[] args) { do { int n; n=SoNguyen.NhapSoNguyenDuong("Nhap n = "); Console.Write("Tich tat cac uoc so cua so nguyen duong "+n+" la "+TinhToan.tichuoc(n)); } while (SoNguyen.NhapSoNguyen("\nTiep tuc (1.Tiep, 0.Khong) ? ")!=0); }