//phep tru static SoLon Tru(SoLon a, SoLon b) { if (b.ToString() == "0") { return(a); } else if (a.ToString() == "0") { return(b); } var max = Math.Max(a.arr.Length, b.arr.Length); var mangLon = MakeSameLength(a.arr, max); var mangNho = MakeSameLength(b.arr, max); if (a.Compareto(b) == -1) { mangLon = b.arr; mangNho = a.arr; } var ret = TruMang(mangLon, mangNho); return(new SoLon(ret)); }
// phep nhan static SoLon Nhan(SoLon a, SoLon b) { var mangLon = a.arr; var mangNho = KiemTraMangKhac0(b.arr); if (a.Compareto(b) == -1) { mangLon = b.arr; mangNho = KiemTraMangKhac0(a.arr); } var ret = new int[mangNho.Length]; for (int i = 0; i < mangNho.Length; i++) { var x = NhanSoVoiMang(mangNho[mangNho.Length - 1 - i], mangLon); if (i > 0) { x = Them10DonViChoSo(x, i); } ret = CongMang(x, ret); } return(new SoLon(ret.ToArray())); }