static void Main(string[] args) { Phanso t = new Phanso(); t.nhap(); Console.WriteLine(" ps thu 1"); t.hien(); Phanso t2 = new Phanso(); t2.nhap(); Console.WriteLine("ps thu 2"); t2.hien(); Phanso t3 = t + t2; t3.rutgon(); Console.WriteLine("tong 2 ps"); t3.hien(); Phanso t4 = t * t2; t4.rutgon(); Console.WriteLine("tich 2 ps"); t4.hien(); Console.WriteLine("ket qua so sanh"); if (t > t2) { Console.WriteLine("ps t1>ps t2"); } else if (t < t2) { Console.WriteLine("ps t1<ps t2"); } else { Console.WriteLine("hai ps = nhau"); } Console.ReadKey(); }