using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("======k++,++k======");

        int k=0;

        k++; Console.WriteLine("k is {0}", k); k++;

        Console.WriteLine("k is {0}", k);

        ++k; Console.WriteLine("k is {0}", k);

        Console.WriteLine("");

        Console.WriteLine("=======k--,--k========");

        k--; Console.WriteLine("k is {0}", k);

        k--; Console.WriteLine("k is {0}", k);

        --k; Console.WriteLine("k is {0}", k);

        Console.ReadLine();

    }

}