private static void Main(string[] args) { try { Operation operation1 = new OperationAdd(); operation1.NumberA = 3; operation1.NumberB = 5; Console.WriteLine("结果是:" + operation1.GetResult()); Operation operation2 = new OperationAdd(); operation2.NumberA = 9; operation2.NumberB = 4; Console.WriteLine("结果是:" + operation2.GetResult()); Operation operation3 = new OperationAdd(); operation3.NumberA = 3; operation3.NumberB = 2; Console.WriteLine("结果是:" + operation3.GetResult()); Operation operation4 = new OperationDiv(); operation4.NumberA = 8; operation4.NumberB = 2; Console.WriteLine("结果是:" + operation4.GetResult()); Operation operation5 = new OperationDiv(); operation5.NumberA = 6; operation5.NumberB = 3; Console.WriteLine("结果是:" + operation5.GetResult()); Console.ReadLine(); } catch (Exception ex) { Console.WriteLine(ex.Message); Console.ReadLine(); } }