public static StateNode CreateNode(StateNode node)
{
NodeManager nManager = NodeManager.getInstance();
// call base function
return(nManager.baseCreateNode(node));
}
public StateNode(int[] array)
{
this.StateArray2 = array;
this.pUp = null;
this.pDown = null;
this.pRight = null;
this.pLeft = null;
this.pParent = null;
}
public StateNode()
{
this.StateArray2 = new int[] { 1, 2, 3, 8, 9, 4, 7, 6, 5 };
this.pUp = null;
this.pDown = null;
this.pRight = null;
this.pLeft = null;
this.pParent = null;
}
public StateNode()
{
this.StateArray2 = new int[] { 1, 2, 3, 8, 9, 4, 7, 6, 5 };
this.pUp = null;
this.pDown = null;
this.pRight = null;
this.pLeft = null;
this.pParent = null;
this.ArrayStateInt = HashConvertToInt(this.StateArray2);
}
public StateNode(int[] array)
{
this.StateArray2 = array;
this.pUp = null;
this.pDown = null;
this.pRight = null;
this.pLeft = null;
this.pParent = null;
this.ArrayStateInt = HashConvertToInt(this.StateArray2);
}
public static void Add(StateNode node)
{
// make sure not null
Debug.Assert(node != null);
// get Singleton instance
NodeManager nManager = NodeManager.getInstance();
// call base class function
}
// Copy Constructor for Deep Copy
public StateNode(StateNode otherNode)
{
this.StateArray2 = new int[] { 9, 9, 9, 9, 9, 9, 9, 9, 9 };
this.StateArray2 = otherNode.StateArray2;
this.pUp = null;
this.pDown = null;
this.pRight = null;
this.pLeft = null;
this.pParent = null;
}
// Copy Constructor for Deep Copy
public StateNode(StateNode otherNode)
{
this.StateArray2 = new int[] { 9, 9, 9, 9, 9, 9, 9, 9, 9 };
this.StateArray2 = otherNode.StateArray2;
this.pUp = null;
this.pDown = null;
this.pRight = null;
this.pLeft = null;
this.pParent = null;
this.ArrayStateInt = HashConvertToInt(this.StateArray2);
}
public static int[] SwapNums4(StateNode node, int position1, int position2)
{
StateNode newNode = new StateNode(node);
int[] TempArray = newNode.StateArray2;
int temp = TempArray[position1];
TempArray[position1] = TempArray[position2];
TempArray[position2] = temp;
return(TempArray);
}
public static void PrettyPrintPathToSolvePuzzle(StateNode node)
{
int TotalCostOfAllMoves = 0;
// create a stack to put the nodes on. Later we will pop them off to get the order of moves
// to solve the puzzle
Stack <StateNode> stackOfNodes = new Stack <StateNode>();
//StateNode nodePointer = new StateNode();
StateNode nodePointer = null;
StateNode nodePointer2 = null;
nodePointer = node;
nodePointer2 = node.pParent;
while (nodePointer != null)
{
stackOfNodes.Push(nodePointer);
nodePointer = nodePointer.pParent;
}
int LengthOfSolution = stackOfNodes.Count();
foreach (StateNode sn in stackOfNodes)
{
foreach (var item in sn.StateArray2)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine("CostOfMove = " + sn.CostOfMove);
TotalCostOfAllMoves = TotalCostOfAllMoves + sn.CostOfMove;
Console.WriteLine("TotalCostOfAllMoves = " + TotalCostOfAllMoves);
Console.WriteLine();
Console.WriteLine("Direction of Move = " + sn.direction);
Console.WriteLine();
Console.WriteLine("Length = " + (LengthOfSolution - 1));
Console.WriteLine();
Console.WriteLine("ArrayStateInt " + sn.ArrayStateInt);
Console.WriteLine();
}
Console.WriteLine("\nGoalStateNode\n");
foreach (var item in node.StateArray2)
{
Console.Write(item.ToString() + " ");
}
}
public static int NumTilesOutOfPlace(StateNode node)
{
int NumOutOfPlace = 0;
if (node.StateArray2[0] != 1)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[1] != 2)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[2] != 3)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[5] != 4)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[8] != 5)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[7] != 6)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[6] != 7)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
if (node.StateArray2[3] != 8)
{
NumOutOfPlace = NumOutOfPlace + 1;
}
return(NumOutOfPlace);
}
static void Main(string[] args)
{
/////////// Uniform Cost //////////////////////
int[] PuzzleArray = new int[] { 0, 2, 3, 1, 8, 4, 7, 6, 5 };
int[] Easy = new int[] { 1, 3, 4, 8, 6, 2, 7, 0, 5 };
int[] Medium = new int[] { 2, 8, 1, 0, 4, 3, 7, 6, 5 };
int[] Hard = new int[] { 5, 6, 7, 4, 0, 8, 3, 2, 1 };
int[] GoalState = new int[] { 1, 2, 3, 8, 0, 4, 7, 6, 5 };
StateNode GoalStateNode = new StateNode();
int Time = 0;
int TotalCostOfAllMoves;
//int CostFromStart;
int SizeOfSortedList = 0;
int MaxOfSortedList = 0;
int SizeOfPQ = 0;
int MaxOfPQ = 0;
PuzzleArray = Hard;
foreach (var item in PuzzleArray)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine();
foreach (var item in PuzzleArray)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine("State array");
Console.WriteLine();
StateNode node = new StateNode();
StateNode root = new StateNode(PuzzleArray);
//foreach (var item in node.StateArray)
//{
// Console.Write(item.ToString() + " ");
//}
Console.WriteLine();
Console.WriteLine("State array Passing PuzzleArray");
Console.WriteLine();
foreach (var item in root.StateArray2)
{
Console.Write(item.ToString() + " ");
}
//// Create Queue of Nodes
//Queue<StateNode> q = new Queue<StateNode>();
// Create Queue that will accept queue returned from Successor function
Queue <StateNode> qFromSuccessorFunction = new Queue <StateNode>();
//// Put original puzzle state in queue
//q.Enqueue(root);
//SizeOfQueue = 1;
//MaxOfQueue = MaxOfQueue + 1;
// Depth First Search - Create a stack
// Stack<StateNode> stack = new Stack<StateNode>();
// Uniform Cost Search - Need to make a Sorted List
// Sorted based on the smallest cost from the start node of tree
// Each move made the cost is the value of tile moved
SortedList <int, StateNode> sortedListBasedOnCostOfMovesFromStart = new SortedList <int, StateNode>();
PriorityQueue <StateNode> pq = new PriorityQueue <StateNode>();
//// Put original puzzle state in Sorted List
//sortedListBasedOnCostOfMovesFromStart.Add(root.CostOfMovesFromStart, root);
//SizeOfSortedList = SizeOfSortedList + 1;
//MaxOfSortedList = MaxOfSortedList + 1;
pq.Add(root.CostOfMovesFromStart, root);
SizeOfPQ = SizeOfPQ + 1;
MaxOfPQ = MaxOfPQ + 1;
//// Put original puzzle state on stack
//stack.Push(root);
//SizeOfStack = SizeOfStack + 1;
//MaxOfStack = MaxOfStack + 1;
// Create two Dictionaries to look up previous states for state checking. Need to check if on the stack or if it was
// previously looked at.
Dictionary <int, int> dictOfNodesInPQ = new Dictionary <int, int>();
Dictionary <int, int> dictOfStateArraysSeenBefore = new Dictionary <int, int>();
dictOfNodesInPQ.Add(root.ArrayStateInt, root.ArrayStateInt);
// Beginning of General Search Loop
bool keepRunning = true;
while (keepRunning)
{
if (pq.Count == 0)
{
Console.WriteLine("sortedList empty");
keepRunning = false;
}
if (keepRunning == false)
{
break;
}
//Remove Nodes from from of the sortedList
StateNode removeFromPQ = new StateNode();
//Assigns Node to first element of list
removeFromPQ = pq.RemoveMin();
//Then need to remove the first element(<key, value> pair) of sorted list
Time = Time + 1;
//// Remove nodes from top of stack for Depth-First Search
//StateNode removeFromTopOfStack = new StateNode();
//removeFromTopOfStack = stack.Pop();
//Time = Time + 1;
// Remove node from Dictionary with list of nodes currently on stack
dictOfNodesInPQ.Remove(removeFromPQ.ArrayStateInt);
Console.WriteLine();
Console.WriteLine("removing this node StateArrayInt: " + removeFromPQ.ArrayStateInt);
Console.WriteLine();
// add this node to dictionary of nodes we have seen before if we haven't already seen it
if (dictOfStateArraysSeenBefore.ContainsKey(removeFromPQ.ArrayStateInt))
{
//do nothing
}
else
{
dictOfStateArraysSeenBefore.Add(removeFromPQ.ArrayStateInt, removeFromPQ.ArrayStateInt);
}
// check if node ArrayState is Equal to the GoalState to Solve PuzzleEight
bool isEqual = Enumerable.SequenceEqual(removeFromPQ.StateArray2, GoalState);
if (isEqual)
{
Console.WriteLine();
Console.WriteLine("Puzzle is Solved!");
GoalStateNode = removeFromPQ;
Console.WriteLine();
break;
}
// create a queue to accept the queue returned from successor function
qFromSuccessorFunction = StateNode.Successor(removeFromPQ);
//// add nodes from Successor Function into the q for the loop
while (qFromSuccessorFunction.Count != 0)
{
StateNode removeFromFrontOfSuccessorQueue = new StateNode();
removeFromFrontOfSuccessorQueue = qFromSuccessorFunction.Dequeue();
//If we have already seen this state before or this state is on the stack currently, do nothing. Otherwise put state in both dictionaries
if (dictOfNodesInPQ.ContainsKey(removeFromFrontOfSuccessorQueue.ArrayStateInt) || (dictOfStateArraysSeenBefore.ContainsKey(removeFromFrontOfSuccessorQueue.ArrayStateInt)))
{
// do nothing
}
else
{
pq.Add(removeFromFrontOfSuccessorQueue.CostOfMovesFromStart, removeFromFrontOfSuccessorQueue);
// sortedListBasedOnCostOfMovesFromStart.Add(removeFromFrontOfSuccessorQueue.CostOfMovesFromStart, removeFromFrontOfSuccessorQueue);
dictOfNodesInPQ.Add(removeFromFrontOfSuccessorQueue.ArrayStateInt, removeFromFrontOfSuccessorQueue.ArrayStateInt);
dictOfStateArraysSeenBefore.Add(removeFromFrontOfSuccessorQueue.ArrayStateInt, removeFromFrontOfSuccessorQueue.ArrayStateInt);
}
SizeOfPQ = pq.Count;
//SizeOfSortedList = sortedListBasedOnCostOfMovesFromStart.Count();
//if (MaxOfSortedList < SizeOfSortedList)
//{
// MaxOfSortedList = SizeOfSortedList;
//}
if (MaxOfPQ < SizeOfPQ)
{
MaxOfPQ = SizeOfPQ;
}
}
}
Console.WriteLine();
Console.WriteLine("out of loop");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Here were the successful moves to solve the puzzle:");
Console.WriteLine();
StateNode.PrettyPrintPathToSolvePuzzle(GoalStateNode);
Console.WriteLine();
Console.WriteLine("Time = " + Time);
Console.WriteLine();
Console.WriteLine("MaxOfPQ " + MaxOfPQ);
Console.WriteLine();
Console.ReadLine();
}
static void Main(string[] args)
{
int[] PuzzleArray = new int[] { 0, 2, 3, 1, 8, 4, 7, 6, 5 };
int[] Easy = new int[] { 1, 3, 4, 8, 6, 2, 7, 0, 5 };
int[] Medium = new int[] { 2, 8, 1, 0, 4, 3, 7, 6, 5 };
int[] Hard = new int[] { 5, 6, 7, 4, 0, 8, 3, 2, 1 };
int[] GoalState = new int[] { 1, 2, 3, 8, 0, 4, 7, 6, 5 };
StateNode GoalStateNode = new StateNode();
int Time = 0;
int TotalCostOfAllMoves;
int MaxOfQueue = 0;
int SizeOfQueue = 0;
int SizeOfStack = 0;
int MaxOfStack = 0;
bool IteritiveDeepeningSolve = false;
//Max set of Levels to go Down in Iterative Deepening
//int BigL = 0;
for (int BigL = 0; BigL < 999999999; BigL++)
{
PuzzleArray = Hard;
foreach (var item in PuzzleArray)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine();
foreach (var item in PuzzleArray)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine("State array");
Console.WriteLine();
StateNode node = new StateNode();
StateNode root = new StateNode(PuzzleArray);
//foreach (var item in node.StateArray)
//{
// Console.Write(item.ToString() + " ");
//}
Console.WriteLine();
Console.WriteLine("State array Passing PuzzleArray");
Console.WriteLine();
foreach (var item in root.StateArray2)
{
Console.Write(item.ToString() + " ");
}
//// Create Queue of Nodes
//Queue<StateNode> q = new Queue<StateNode>();
// Create Queue that will accept queue returned from Successor function
Queue <StateNode> qFromSuccessorFunction = new Queue <StateNode>();
//// Put original puzzle state in queue
//q.Enqueue(root);
//SizeOfQueue = 1;
//MaxOfQueue = MaxOfQueue + 1;
// Depth First Search - Create a stack
Stack <StateNode> stack = new Stack <StateNode>();
// Put original puzzle state on stack
stack.Push(root);
SizeOfStack = SizeOfStack + 1;
MaxOfStack = MaxOfStack + 1;
// Create two Dictionaries to look up previous states for state checking. Need to check if on the stack or if it was
// previously looked at.
Dictionary <int, int> dictOfNodesOnStack = new Dictionary <int, int>();
Dictionary <int, int> dictOfStateArraysSeenBefore = new Dictionary <int, int>();
dictOfNodesOnStack.Add(root.ArrayStateInt, root.ArrayStateInt);
// Beginning of General Search Loop
bool keepRunning = true;
while (keepRunning)
{
if (stack.Count == 0)
{
Console.WriteLine("stack empty");
keepRunning = false;
}
if (keepRunning == false)
{
break;
}
//// Remove nodes from front of queue for Breadth-First Search
//StateNode removeFromFront = new StateNode();
//removeFromFront = q.Dequeue();
//Time = Time + 1;
// Remove nodes from top of stack for Depth-First Search
StateNode removeFromTopOfStack = new StateNode();
removeFromTopOfStack = stack.Pop();
Time = Time + 1;
// Remove node from Dictionary with list of nodes currently on stack
dictOfNodesOnStack.Remove(removeFromTopOfStack.ArrayStateInt);
Console.WriteLine();
Console.WriteLine("removing this node StateArrayInt: " + removeFromTopOfStack.ArrayStateInt);
Console.WriteLine();
// add this node to dictionary of nodes we have seen before if we haven't already seen it
if (dictOfStateArraysSeenBefore.ContainsKey(removeFromTopOfStack.ArrayStateInt))
{
//do nothing
}
else
{
dictOfStateArraysSeenBefore.Add(removeFromTopOfStack.ArrayStateInt, removeFromTopOfStack.ArrayStateInt);
}
bool isEqual = Enumerable.SequenceEqual(removeFromTopOfStack.StateArray2, GoalState);
if (isEqual)
{
Console.WriteLine();
//Console.WriteLine("Puzzle is Solved!");
IteritiveDeepeningSolve = true;
GoalStateNode = removeFromTopOfStack;
Console.WriteLine();
break;
}
// REturn the Node that matches solution
// Check the level of Node in the tree. If Node level is less than BigL, call sussessor.
// If == to BigL, can't call successor. We reached limit.
if (removeFromTopOfStack.LevelDownInTree < BigL)
{
qFromSuccessorFunction = StateNode.Successor(removeFromTopOfStack);
}
//// add nodes from Successor Function into the q for the loop
//while (qFromSuccessorFunction.Count != 0)
//{
// StateNode removeFromFrontOfSuccessorQueue = new StateNode();
// removeFromFrontOfSuccessorQueue = qFromSuccessorFunction.Dequeue();
// q.Enqueue(removeFromFrontOfSuccessorQueue);
// SizeOfQueue = q.Count;
// if (MaxOfQueue < SizeOfQueue)
// {
// MaxOfQueue = SizeOfQueue;
// }
//}
//// add nodes from Successor Function into the q for the loop
while (qFromSuccessorFunction.Count != 0)
{
StateNode removeFromFrontOfSuccessorQueue = new StateNode();
removeFromFrontOfSuccessorQueue = qFromSuccessorFunction.Dequeue();
//If we have already seen this state before or this state is on the stack currently, do nothing. Otherwise put state in both dictionaries
if (dictOfNodesOnStack.ContainsKey(removeFromFrontOfSuccessorQueue.ArrayStateInt) || (dictOfStateArraysSeenBefore.ContainsKey(removeFromFrontOfSuccessorQueue.ArrayStateInt)))
{
// do nothing
}
else
{
stack.Push(removeFromFrontOfSuccessorQueue);
dictOfNodesOnStack.Add(removeFromFrontOfSuccessorQueue.ArrayStateInt, removeFromFrontOfSuccessorQueue.ArrayStateInt);
dictOfStateArraysSeenBefore.Add(removeFromFrontOfSuccessorQueue.ArrayStateInt, removeFromFrontOfSuccessorQueue.ArrayStateInt);
}
SizeOfStack = stack.Count();
if (MaxOfStack < SizeOfStack)
{
MaxOfStack = SizeOfStack;
}
}
}
if (IteritiveDeepeningSolve == true)
{
Console.WriteLine();
Console.WriteLine("out of loop");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Here were the successful moves to solve the puzzle:");
Console.WriteLine();
StateNode.PrettyPrintPathToSolvePuzzle(GoalStateNode);
Console.WriteLine();
Console.WriteLine("Time = " + Time);
Console.WriteLine();
Console.WriteLine("MaxOfStack " + MaxOfStack);
Console.WriteLine();
break;
}
//Console.ReadLine();
}
Console.WriteLine();
Console.WriteLine("IterativeDeepening Solved at this level : " + GoalStateNode.LevelDownInTree);
Console.WriteLine();
Console.ReadLine();
}
public StateNode baseCreateNode(StateNode InNode)
{
StateNode sNode = new StateNode(InNode.StateArray2);
return(sNode);
}
public static Queue <StateNode> Successor(StateNode sNode)
//public static void Successor(StateNode sNode)
{
// determine where the zero is in the array. This will allow us to determine all the next possible moves.
// Then we can determine all the next possible states the puzzle can be in.
for (int i = 0; i < 9; i++)
{
if (sNode.StateArray2[i] == 0)
{
sNode.zeroPosition = i;
}
}
Console.WriteLine("zeroPosition = " + sNode.zeroPosition);
Console.WriteLine();
// Make 4 Nodes
//StateNode sNodeLeft;
//sNodeLeft = NodeManager.CreateNode(sNode);
StateNode sNodeLeft = new StateNode(sNode);
StateNode sNodeRight = new StateNode(sNode);
StateNode sNodeUp = new StateNode(sNode);
StateNode sNodeDown = new StateNode(sNode);
// point the parent pointer of each node to the sNode
sNodeLeft.pParent = sNode;
sNodeUp.pParent = sNode;
sNodeDown.pParent = sNode;
sNodeRight.pParent = sNode;
// point the pointers of the sNode to each of the nodes just created
sNode.pLeft = sNodeLeft;
sNode.pRight = sNodeRight;
sNode.pUp = sNodeUp;
sNode.pDown = sNodeDown;
//
//Now determine all the next possible states the puzzle can be in
// CREATE A LIST WITH ALL THE NEXT STATES
Queue <StateNode> qNodes = new Queue <StateNode>();
switch (sNode.zeroPosition)
{
case 0:
// move left, need to create a node
// Console.WriteLine("Case0\n\n");
sNodeLeft.StateArray2 = SwapNums3(sNodeLeft.StateArray2, 1, 0);
sNodeLeft.CostOfMove = sNodeLeft.StateArray2[0];
sNodeLeft.direction = StateNode.DirectionOfMove.Left;
sNodeLeft.ArrayStateInt = HashConvertToInt(sNodeLeft.StateArray2);
sNodeLeft.CostOfMovesFromStart = sNodeLeft.CostOfMove + sNode.CostOfMovesFromStart;
// move up
sNodeUp.StateArray2 = SwapNums3(sNodeUp.StateArray2, 3, 0);
sNodeUp.CostOfMove = sNodeUp.StateArray2[0];
sNodeUp.direction = StateNode.DirectionOfMove.Up;
sNodeUp.ArrayStateInt = HashConvertToInt(sNodeUp.StateArray2);
sNodeUp.CostOfMovesFromStart = sNodeUp.CostOfMove + sNode.CostOfMovesFromStart;
// sNodeUp.StateArray2 = SwapNums4(sNodeUp, 3, 0);
sNodeRight = null;
sNodeDown = null;
break;
case 1:
// Console.WriteLine("Case1\n\n");
// move right
sNodeRight.StateArray2 = SwapNums3(sNodeRight.StateArray2, 1, 0);
sNodeRight.CostOfMove = sNodeRight.StateArray2[1];
sNodeRight.direction = StateNode.DirectionOfMove.Right;
sNodeRight.ArrayStateInt = HashConvertToInt(sNodeRight.StateArray2);
sNodeRight.CostOfMovesFromStart = sNodeRight.CostOfMove + sNode.CostOfMovesFromStart;
// move left
sNodeLeft.StateArray2 = SwapNums3(sNodeLeft.StateArray2, 2, 1);
sNodeLeft.CostOfMove = sNodeLeft.StateArray2[1];
sNodeLeft.direction = StateNode.DirectionOfMove.Left;
sNodeLeft.ArrayStateInt = HashConvertToInt(sNodeLeft.StateArray2);
sNodeLeft.CostOfMovesFromStart = sNodeLeft.CostOfMove + sNode.CostOfMovesFromStart;
// move up
sNodeUp.StateArray2 = SwapNums3(sNodeUp.StateArray2, 1, 4);
sNodeUp.CostOfMove = sNodeUp.StateArray2[1];
sNodeUp.direction = StateNode.DirectionOfMove.Up;
sNodeUp.ArrayStateInt = HashConvertToInt(sNodeUp.StateArray2);
sNodeUp.CostOfMovesFromStart = sNodeUp.CostOfMove + sNode.CostOfMovesFromStart;
// delete down
sNodeDown = null;
break;
case 2:
// Console.WriteLine("Case2\n\n");
// move right
sNodeRight.StateArray2 = SwapNums3(sNodeRight.StateArray2, 1, 2);
sNodeRight.CostOfMove = sNodeRight.StateArray2[2];
sNodeRight.direction = StateNode.DirectionOfMove.Right;
sNodeRight.ArrayStateInt = HashConvertToInt(sNodeRight.StateArray2);
sNodeRight.CostOfMovesFromStart = sNodeRight.CostOfMove + sNode.CostOfMovesFromStart;
// move up
sNodeUp.StateArray2 = SwapNums3(sNodeUp.StateArray2, 2, 5);
sNodeUp.CostOfMove = sNodeUp.StateArray2[2];
sNodeUp.direction = StateNode.DirectionOfMove.Up;
sNodeUp.ArrayStateInt = HashConvertToInt(sNodeUp.StateArray2);
sNodeUp.CostOfMovesFromStart = sNodeUp.CostOfMove + sNode.CostOfMovesFromStart;
// delete down and left
sNodeDown = null;
sNodeLeft = null;
break;
case 3:
// Console.WriteLine("Case3\n\n");
// move down
sNodeDown.StateArray2 = SwapNums3(sNodeDown.StateArray2, 3, 0);
sNodeDown.CostOfMove = sNodeDown.StateArray2[3];
sNodeDown.direction = StateNode.DirectionOfMove.Down;
sNodeDown.ArrayStateInt = HashConvertToInt(sNodeDown.StateArray2);
sNodeDown.CostOfMovesFromStart = sNodeDown.CostOfMove + sNode.CostOfMovesFromStart;
// move left
sNodeLeft.StateArray2 = SwapNums3(sNodeLeft.StateArray2, 3, 4);
sNodeLeft.CostOfMove = sNodeLeft.StateArray2[3];
sNodeLeft.direction = StateNode.DirectionOfMove.Left;
sNodeLeft.ArrayStateInt = HashConvertToInt(sNodeLeft.StateArray2);
sNodeLeft.CostOfMovesFromStart = sNodeLeft.CostOfMove + sNode.CostOfMovesFromStart;
// move up
sNodeUp.StateArray2 = SwapNums3(sNodeUp.StateArray2, 3, 6);
sNodeUp.CostOfMove = sNodeUp.StateArray2[3];
sNodeUp.direction = StateNode.DirectionOfMove.Up;
sNodeUp.ArrayStateInt = HashConvertToInt(sNodeUp.StateArray2);
sNodeUp.CostOfMovesFromStart = sNodeUp.CostOfMove + sNode.CostOfMovesFromStart;
sNodeRight = null;
break;
case 4:
// Console.WriteLine("Case4\n\n");
// move down
sNodeDown.StateArray2 = SwapNums3(sNodeDown.StateArray2, 4, 1);
sNodeDown.CostOfMove = sNodeDown.StateArray2[4];
sNodeDown.direction = StateNode.DirectionOfMove.Down;
sNodeDown.ArrayStateInt = HashConvertToInt(sNodeDown.StateArray2);
sNodeDown.CostOfMovesFromStart = sNodeDown.CostOfMove + sNode.CostOfMovesFromStart;
// move right
sNodeRight.StateArray2 = SwapNums3(sNodeRight.StateArray2, 4, 3);
sNodeRight.CostOfMove = sNodeRight.StateArray2[4];
sNodeRight.direction = StateNode.DirectionOfMove.Right;
sNodeRight.ArrayStateInt = HashConvertToInt(sNodeRight.StateArray2);
sNodeRight.CostOfMovesFromStart = sNodeRight.CostOfMove + sNode.CostOfMovesFromStart;
// move left
sNodeLeft.StateArray2 = SwapNums3(sNodeLeft.StateArray2, 4, 5);
sNodeLeft.CostOfMove = sNodeLeft.StateArray2[4];
sNodeLeft.direction = StateNode.DirectionOfMove.Left;
sNodeLeft.ArrayStateInt = HashConvertToInt(sNodeLeft.StateArray2);
sNodeLeft.CostOfMovesFromStart = sNodeLeft.CostOfMove + sNode.CostOfMovesFromStart;
// move up
sNodeUp.StateArray2 = SwapNums3(sNodeUp.StateArray2, 4, 7);
sNodeUp.CostOfMove = sNodeUp.StateArray2[4];
sNodeUp.direction = StateNode.DirectionOfMove.Up;
sNodeUp.ArrayStateInt = HashConvertToInt(sNodeUp.StateArray2);
sNodeUp.CostOfMovesFromStart = sNodeUp.CostOfMove + sNode.CostOfMovesFromStart;
break;
case 5:
// Console.WriteLine("Case5\n\n");
// move down
sNodeDown.StateArray2 = SwapNums3(sNodeDown.StateArray2, 5, 2);
sNodeDown.CostOfMove = sNodeDown.StateArray2[5];
sNodeDown.direction = StateNode.DirectionOfMove.Down;
sNodeDown.ArrayStateInt = HashConvertToInt(sNodeDown.StateArray2);
sNodeDown.CostOfMovesFromStart = sNodeDown.CostOfMove + sNode.CostOfMovesFromStart;
// move up
sNodeUp.StateArray2 = SwapNums3(sNodeUp.StateArray2, 5, 8);
sNodeUp.CostOfMove = sNodeUp.StateArray2[5];
sNodeUp.direction = StateNode.DirectionOfMove.Up;
sNodeUp.ArrayStateInt = HashConvertToInt(sNodeUp.StateArray2);
sNodeUp.CostOfMovesFromStart = sNodeUp.CostOfMove + sNode.CostOfMovesFromStart;
// move right
sNodeRight.StateArray2 = SwapNums3(sNodeRight.StateArray2, 5, 4);
sNodeRight.CostOfMove = sNodeRight.StateArray2[5];
sNodeRight.direction = StateNode.DirectionOfMove.Right;
sNodeRight.ArrayStateInt = HashConvertToInt(sNodeRight.StateArray2);
sNodeRight.CostOfMovesFromStart = sNodeRight.CostOfMove + sNode.CostOfMovesFromStart;
sNodeLeft = null;
break;
case 6:
// Console.WriteLine("Case6\n\n");
// move down
sNodeDown.StateArray2 = SwapNums3(sNodeDown.StateArray2, 6, 3);
sNodeDown.CostOfMove = sNodeDown.StateArray2[6];
sNodeDown.direction = StateNode.DirectionOfMove.Down;
sNodeDown.ArrayStateInt = HashConvertToInt(sNodeDown.StateArray2);
sNodeDown.CostOfMovesFromStart = sNodeDown.CostOfMove + sNode.CostOfMovesFromStart;
// move left
sNodeLeft.StateArray2 = SwapNums3(sNodeLeft.StateArray2, 6, 7);
sNodeLeft.CostOfMove = sNodeLeft.StateArray2[6];
sNodeLeft.direction = StateNode.DirectionOfMove.Left;
sNodeLeft.ArrayStateInt = HashConvertToInt(sNodeLeft.StateArray2);
sNodeLeft.CostOfMovesFromStart = sNodeLeft.CostOfMove + sNode.CostOfMovesFromStart;
sNodeUp = null;
sNodeRight = null;
break;
case 7:
// Console.WriteLine("Case7\n\n");
// move right
sNodeRight.StateArray2 = SwapNums3(sNodeRight.StateArray2, 7, 6);
sNodeRight.CostOfMove = sNodeRight.StateArray2[7];
sNodeRight.direction = StateNode.DirectionOfMove.Right;
sNodeRight.ArrayStateInt = HashConvertToInt(sNodeRight.StateArray2);
sNodeRight.CostOfMovesFromStart = sNodeRight.CostOfMove + sNode.CostOfMovesFromStart;
// move left
sNodeLeft.StateArray2 = SwapNums3(sNodeLeft.StateArray2, 7, 8);
sNodeLeft.CostOfMove = sNodeLeft.StateArray2[7];
sNodeLeft.direction = StateNode.DirectionOfMove.Left;
sNodeLeft.ArrayStateInt = HashConvertToInt(sNodeLeft.StateArray2);
sNodeLeft.CostOfMovesFromStart = sNodeLeft.CostOfMove + sNode.CostOfMovesFromStart;
// move down
sNodeDown.StateArray2 = SwapNums3(sNodeDown.StateArray2, 7, 4);
sNodeDown.CostOfMove = sNodeDown.StateArray2[7];
sNodeDown.direction = StateNode.DirectionOfMove.Down;
sNodeDown.ArrayStateInt = HashConvertToInt(sNodeDown.StateArray2);
sNodeDown.CostOfMovesFromStart = sNodeDown.CostOfMove + sNode.CostOfMovesFromStart;
sNodeUp = null;
break;
case 8:
// Console.WriteLine("Case8\n\n");
// move right
sNodeRight.StateArray2 = SwapNums3(sNodeRight.StateArray2, 8, 7);
sNodeRight.CostOfMove = sNodeRight.StateArray2[8];
sNodeRight.direction = StateNode.DirectionOfMove.Right;
sNodeRight.ArrayStateInt = HashConvertToInt(sNodeRight.StateArray2);
sNodeRight.CostOfMovesFromStart = sNodeRight.CostOfMove + sNode.CostOfMovesFromStart;
// move down
sNodeDown.StateArray2 = SwapNums3(sNodeDown.StateArray2, 8, 5);
sNodeDown.CostOfMove = sNodeDown.StateArray2[8];
sNodeDown.direction = StateNode.DirectionOfMove.Down;
sNodeDown.ArrayStateInt = HashConvertToInt(sNodeDown.StateArray2);
sNodeDown.CostOfMovesFromStart = sNodeDown.CostOfMove + sNode.CostOfMovesFromStart;
sNodeUp = null;
sNodeLeft = null;
break;
}
//Now determine all the next possible states the puzzle can be in
// ALL THE NEXT STATES in a queue and send it to main loop
if (sNodeDown != null)
{
qNodes.Enqueue(sNodeDown);
//Console.WriteLine("\nStateArrayDown\n");
//foreach (var item in sNodeDown.StateArray2)
//{
// Console.Write(item.ToString() + " ");
//}
//Console.WriteLine("CostOfMove = " + sNodeDown.CostOfMove);
}
if (sNodeUp != null)
{
qNodes.Enqueue(sNodeUp);
//Console.WriteLine("\nStateArrayUp\n");
//foreach (var item in sNodeUp.StateArray2)
//{
// Console.Write(item.ToString() + " ");
//}
//Console.WriteLine("CostOfMove = " + sNodeUp.CostOfMove);
}
if (sNodeLeft != null)
{
qNodes.Enqueue(sNodeLeft);
//Console.WriteLine("\nStateArrayLeft\n");
//foreach (var item in sNodeLeft.StateArray2)
//{
// Console.Write(item.ToString() + " ");
//}
//Console.WriteLine("CostOfMove = " + sNodeLeft.CostOfMove);
}
if (sNodeRight != null)
{
qNodes.Enqueue(sNodeRight);
//Console.WriteLine("\nStateArrayRight\n");
//foreach (var item in sNodeRight.StateArray2)
//{
// Console.Write(item.ToString() + " ");
//}
//Console.WriteLine("CostOfMove = " + sNodeRight.CostOfMove);
}
// return the queue
return(qNodes);
//switch statement for each index number of the array the zero can be in.
}
static void Main(string[] args)
{
int[] PuzzleArray = new int[] { 1, 2, 3, 0, 8, 4, 7, 6, 5 };
int[] Easy = new int[] { 1, 3, 4, 8, 6, 2, 7, 0, 5 };
int[] Medium = new int[] { 2, 8, 1, 0, 4, 3, 7, 6, 5 };
int[] Hard = new int[] { 5, 6, 7, 4, 0, 8, 3, 2, 1 };
int[] GoalState = new int[] { 1, 2, 3, 8, 0, 4, 7, 6, 5 };
StateNode GoalStateNode = new StateNode();
int Time = 0;
int TotalCostOfAllMoves;
int MaxOfQueue = 0;
int SizeOfQueue = 0;
PuzzleArray = Hard;
foreach (var item in PuzzleArray)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine();
foreach (var item in PuzzleArray)
{
Console.Write(item.ToString() + " ");
}
Console.WriteLine();
Console.WriteLine("State array");
Console.WriteLine();
StateNode node = new StateNode();
StateNode root = new StateNode(PuzzleArray);
//foreach (var item in node.StateArray)
//{
// Console.Write(item.ToString() + " ");
//}
Console.WriteLine();
Console.WriteLine("State array Passing PuzzleArray");
Console.WriteLine();
foreach (var item in root.StateArray2)
{
Console.Write(item.ToString() + " ");
}
// Create Queue of Nodes
Queue <StateNode> q = new Queue <StateNode>();
// Create Queue that will accept queue returned from Successor function
Queue <StateNode> qFromSuccessorFunction = new Queue <StateNode>();
// Put original puzzle state in queue
q.Enqueue(root);
SizeOfQueue = 1;
MaxOfQueue = MaxOfQueue + 1;
// Beginning of General Search Loop
bool keepRunning = true;
while (keepRunning)
{
if (q.Count == 0)
{
Console.WriteLine("queue empty");
keepRunning = false;
}
if (keepRunning == false)
{
break;
}
// Remove nodes from front of queue for Breadth-First Search
StateNode removeFromFront = new StateNode();
removeFromFront = q.Dequeue();
Time = Time + 1;
// Check to see if ArrayState of node that was popped from queue matches Puzzle Solution(GoalState)
bool isEqual = Enumerable.SequenceEqual(removeFromFront.StateArray2, GoalState);
if (isEqual)
{
Console.WriteLine();
Console.WriteLine("Puzzle is Solved!");
GoalStateNode = removeFromFront;
Console.WriteLine();
break;
}
// REturn the Node that matches solution
// Call Successor Function to get the next nodes to add to list and Expand
//Console.WriteLine();
//Console.WriteLine("Entering Successor Function");
//Console.WriteLine();
// create a queue to accept the queue returned from successor function
qFromSuccessorFunction = StateNode.Successor(removeFromFront);
// add nodes from Successor Function into the q for the loop
while (qFromSuccessorFunction.Count != 0)
{
StateNode removeFromFrontOfSuccessorQueue = new StateNode();
removeFromFrontOfSuccessorQueue = qFromSuccessorFunction.Dequeue();
q.Enqueue(removeFromFrontOfSuccessorQueue);
SizeOfQueue = q.Count;
if (MaxOfQueue < SizeOfQueue)
{
MaxOfQueue = SizeOfQueue;
}
}
}
Console.WriteLine();
Console.WriteLine("out of loop");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Here were the successful moves to solve the puzzle:");
Console.WriteLine();
StateNode.PrettyPrintPathToSolvePuzzle(GoalStateNode);
Console.WriteLine();
Console.WriteLine("Time = " + Time);
Console.WriteLine();
Console.WriteLine("MaxOfQueue " + MaxOfQueue);
Console.WriteLine();
Console.ReadLine();
}
public void baseAddNode(StateNode node)
{
}
public void baseRemoveNode(StateNode node)
{
}
