static void Main(string[] args)
{
do
{
float a = SoThuc.NhapSoThuc("Nhap a = ");
float b = SoThuc.NhapSoThuc("Nhap b = ");
TinhToan.giapt(a, b);
} while (SoNguyen.NhapSoNguyen("\nTiep tuc (1.Tiep, 0.Khong) ?") != 0);
}