public void GetMove(Pile[] piles, out int pileIndex, out int sticksToRemove)
{
pileIndex = FindIndexOfMax(piles);
sticksToRemove = piles[pileIndex].Count - Xor(piles[pileIndex].Count, NimSum(piles));
if (sticksToRemove == 0)
sticksToRemove = 1;
}
private static void InitializePileSizes(Pile[] piles)
{
for (int i = 0; i < piles.Length; i++)
{
piles[i] = new Pile(GetIntInRange(0, int.MaxValue,
String.Format("Please enter how many sticks you wish there to be in pile {0}.", i + 1)));
}
Console.WriteLine();
}
private static bool CheckForWinner(Pile[] piles)
{
foreach(Pile pile in piles)
{
if (pile.Count > 0)
return false;
}
return true;
}
private int NimSum(Pile[] piles)
{
int nimsum = 0;
foreach (Pile pile in piles)
{
nimsum = Xor(nimsum, pile.Count);
}
return nimsum;
}
private int FindIndexOfMax(Pile[] piles)
{
int max = -1;
int maxIndex = 0;
for (int i = 0; i < piles.Length; i++)
{
if (piles[i].Count > max)
{
max = piles[i].Count;
maxIndex = i;
}
}
return maxIndex;
}
private static void PlayGame()
{
players currentPlayer = players.User;
NimAi computer = new NimAi();
int pileNumber = 0, sticksToRemove = 0;
bool winner = false;
Pile[] piles = new Pile[GetIntInRange(0, 10, "How many piles do you wish to have?")];
InitializePileSizes(piles);
currentPlayer = GetFirstPlayer();
while (!winner)
{
PrintPiles(piles);
Console.WriteLine();
if (currentPlayer == players.User)
{
GetUserMove(piles, out pileNumber, out sticksToRemove);
piles[pileNumber].Count -= sticksToRemove;
AnnounceMove(currentPlayer, pileNumber, sticksToRemove);
}
else //player is computer
{
computer.GetMove(piles, out pileNumber, out sticksToRemove);
piles[pileNumber].Count -= sticksToRemove;
AnnounceMove(currentPlayer, pileNumber, sticksToRemove);
}
winner = CheckForWinner(piles);
if (winner)
{
AnnounceWinner(currentPlayer);
}
else
if (currentPlayer == players.User)
{
currentPlayer = players.Computer;
}
else
{
currentPlayer = players.User;
}
}
}
public void NimAISticksToRemoveTest()
{
NimAi AI = new NimAi();
Pile[] piles = new Pile[5];
piles[0] = new Pile(25);
piles[1] = new Pile(30);
piles[2] = new Pile(4);
piles[3] = new Pile(5);
piles[4] = new Pile(50);
int index, sticksToRemove;
int expectedSticksToRemove = 44;
AI.GetMove(piles, out index, out sticksToRemove);
Assert.AreEqual(sticksToRemove, expectedSticksToRemove);
}
public void PileSetCountNegativeTest()
{
Pile p = new Pile(-1);
}
private static void PrintPiles(Pile[] piles)
{
Console.ForegroundColor = GAME_BOARD_COLOR;
for(int i = 0; i < piles.Length; i++)
{
Console.WriteLine("Pile {0}: {1}\t {2,10}", i + 1, piles[i].Count, piles[i].ToString());
}
Console.ResetColor();
Console.WriteLine();
}
private static void PlayGame()
{
players currentPlayer = players.User;
NimAi computer = new NimAi();
int pileNumber = 0, sticksToRemove = 0;
bool winner = false;
Pile[] piles = new Pile[GetIntInRange(0, 10, "How many piles do you wish to have?")];
InitializePileSizes(piles);
currentPlayer = GetFirstPlayer();
while(!winner)
{
PrintPiles(piles);
Console.WriteLine();
if (currentPlayer == players.User)
{
GetUserMove(piles, out pileNumber, out sticksToRemove);
piles[pileNumber].Count -= sticksToRemove;
AnnounceMove(currentPlayer, pileNumber, sticksToRemove);
}
else //player is computer
{
computer.GetMove(piles, out pileNumber, out sticksToRemove);
piles[pileNumber].Count -= sticksToRemove;
AnnounceMove(currentPlayer, pileNumber, sticksToRemove);
}
winner = CheckForWinner(piles);
if (winner)
AnnounceWinner(currentPlayer);
else
if (currentPlayer == players.User)
currentPlayer = players.Computer;
else
currentPlayer = players.User;
}
}
private static void InitializePileSizes(Pile[] piles)
{
for(int i = 0; i < piles.Length; i++)
{
piles[i] = new Pile(GetIntInRange(0, int.MaxValue,
String.Format("Please enter how many sticks you wish there to be in pile {0}.", i + 1)));
}
Console.WriteLine();
}
private static void GetUserMove( Pile[] piles, out int pileNumber, out int sticksToRemove)
{
bool validPile = false;
do
{
pileNumber = GetIntInRange(1, piles.Length, "Please enter the pile you wish to remove sticks from.") - 1;
if(piles[pileNumber].Count == 0)
{
Console.ForegroundColor = ERROR_MESSAGE_COLOR;
Console.WriteLine("You may only select a pile that still has sticks in it!");
}
else
{
validPile = true;
}
} while (!validPile);
sticksToRemove = GetIntInRange(1, piles[pileNumber].Count,
String.Format("Please enter how many sticks you wish to remove from pile {0}.", pileNumber + 1));
Console.WriteLine();
}
public void Add(int numOfSticks)
{
Pile newPile = new Pile(numOfSticks);
pileList.Add(newPile);
}
