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