class Program
    {
        static void Main(string[] args)
        {
            TestClass test = new TestClass();

            test.TestChu(1, 0);

            TestClass test = new TestClass();

            test.ShuruCar();

            //int int32 (4個(gè)字節(jié))  Int64 long( 8個(gè)字節(jié))

            //Int64[3,2] Array=new Array[]{} ; 元素6個(gè)  int64 是8  48；  

            Console.ReadKey();

        }
    }

 class TestClass
    {
        private int num;

        public TestClass()
        {

            num = 0;
        }

        public void TestChu(int num1, int num2)
        {
            try
            {
                num = num1 / num2;
                int[] arr = new int[2];
                arr[2] = 22;

            }
            catch (DivideByZeroException e)
            {
                // Console.WriteLine(e.Message); 
                Console.WriteLine(e);
            }
            catch (IndexOutOfRangeException ex2)
            {
                Console.WriteLine(ex2);
            }
            catch (InvalidCastException ex3)
            {
                Console.WriteLine(ex3);
            }

            finally
            {
                Console.WriteLine(num1 + "/" + num2 + "=" + num);
            }


        }


        public void ShuruCar()
        {

            string str = Console.ReadLine();
            if (str == "8")
            {
                throw (new NewExeption());
            }


        }

    }

 class NewExeption:Exception
    {

        public NewExeption()
            : base("字符串非法了")
        {


        }
    }