public void WriteNode(StreamWriter sw, int iLevel)
{
sw.Write("{0}({1},", new string(' ', iLevel * 4), Question);
if (anYes != null)
{
sw.WriteLine();
anYes.WriteNode(sw, iLevel + 1);
}
sw.Write(",");
if (anNo != null)
{
sw.WriteLine();
anNo.WriteNode(sw, iLevel + 1);
}
sw.Write(")");
}
static void Main()
{
string strFilename = "GuessTheAnimal.txt";
AnimalNode anRoot;
try
{
StreamReader sr = new StreamReader(strFilename);
anRoot = AnimalNode.ReadNode(sr);
sr.Close();
}
catch
{
anRoot = new AnimalNode();
anRoot.Question = "cat";
}
do
{
// Start playing.
Console.Write("Think of an animal and press Enter.");
Console.ReadLine();
AskQuestion(ref anRoot);
// Save the file.
StreamWriter sw = new StreamWriter(strFilename);
anRoot.WriteNode(sw, 0);
sw.Close();
// Possibly play again.
Console.Write("Would you like to play again? ");
}while (GetYesNo());
}
