C# 入门经典示例.

    class Class3

    {

       static int a = ushort.MaxValue, b;

       static short c;

        static void Main()

        {

          //调试的时候不会报错。

            

                Console.WriteLine(a);

                c = (short)a;

 

                Console.WriteLine(c);

        }

    }

 

 

    class Class3

    {

       static int a = ushort.MaxValue, b;

       static short c;

        static void Main()

        {

             Checked  //调试的时候如果出现溢出，会报错。直接运行不会报错。

            {

                Console.WriteLine(a);

                c = (short)a;

 

                Console.WriteLine(c);

            }

    

        }

    }

 

    class Class3

    {

       static int a = ushort.MaxValue, b;

       static short c;

        static void Main()

        {

 

 

            int a;

            string ok = Console.ReadLine();

            Console.WriteLine(int.TryParse(ok, out a));

            Console.WriteLine(a);

 

            string temp = Console.ReadLine();

            char[] ok = new char[] { ' ', '1' };

            string[] tempArray = temp.Split(ok);

            foreach (var item in tempArray)

            {

                Console.WriteLine(item);

 

            }

            Console.WriteLine("顺3序¨°相¨¤反¤¡ä输º?出?");

            string Lstring = Console.ReadLine();

            for (int i = Lstring.Length - 1; i >= 0; i--)

            {

                Console.WriteLine(Lstring[i]);

 

            }

 

            Console.WriteLine("把ã?Yes 替¬?换?为a No");

 

            string LString = Console.ReadLine();

            LString = LString.Replace("yes", "No");

            Console.WriteLine(LString);

 

           

           

            Console.WriteLine("给?每?个?单Ì£¤词䨺加¨®上¦?双?引°y号?");

        

            string Lstring = Console.ReadLine();

            string[] Rstring = Lstring.Split(' ');

            string result = null;

            foreach (var item in Rstring)

            {

                if (item == string.Empty)

                    continue;

                result += "\"" + item + "\"";

 

            }

 

   

 

            Console.WriteLine(result);

 

 

 

 

          

           

           

 

  

           

        }

    }