static void TestShuffle()
{
ShuffleNumbers shuffler = new ShuffleNumbers();
const int n = 8;
int[] res1 = shuffler.Shuffle(n);
System.Threading.Thread.Sleep(TimeSpan.FromSeconds(1));
int[] res2 = shuffler.Shuffle(n);
System.Diagnostics.Debug.Assert(n == res1.Length);
System.Diagnostics.Debug.Assert(n == res2.Length);
int diff = 0;
for (int i = 0; i < res1.Length; ++i)
{
if (res1[i] != res2[i])
++diff;
}
System.Diagnostics.Debug.Assert(diff >= n/2);
Array.Sort(res1);
for (int i = 0; i < res1.Length; ++i)
{
System.Diagnostics.Debug.Assert(res1[i] == (i + 1));
}
}
static void Main(string[] args)
{
//TestShuffle();
int n = 0;
string nStr = string.Empty;
bool commandLineParam = (args.Length > 0);
ShuffleNumbers shuffler = new ShuffleNumbers();
if (!commandLineParam)
{
Console.Error.WriteLine("In interactive mode just type N below or start it with N as a command line parameter, Enjoy!");
}
do
{
if(commandLineParam)
{
nStr = args[0];
}
else
{
Console.WriteLine("Please enter integer N");
nStr = Console.ReadLine();
}
if (int.TryParse(nStr, out n))
{
try
{
OutputNumbers(shuffler.Shuffle(n));
}
catch (OutOfMemoryException)
{
Console.Error.WriteLine("Not enough memory to handle your request");
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
}
else
{
Console.Error.WriteLine("Input is not an integer.");
}
}while (!commandLineParam);
}
