final AI

Board.cpp

@@ -475,20 +475,20 @@ int Board::evaluate(char max, char min){
 
 	//check for taken conditions
 	if (checkTaken(min)){
-		val += 10;
+		val = val + 10;
 	}
 
 	if (checkTaken(max)){
-		val -= 10;
+		val = val - 10;
 	}
 
 	//ultimate condition!
 	if (isGameOver()){
 		if (whoWon() == max)
-			val = INT_MAX / 2;
+			val = val + 10;
 
 		else
-			val = INT_MIN / 2;
+			val = val - 10;
 	}
 
 	//cout << "val: " << val << "\n";

Engine.cpp

@@ -65,6 +65,7 @@ void Engine::userGame(int difficulty){
 				b->resetTaken();
 				b->setValidFalse();
 			}
+			b->displayBoard();
 		}
 		
 		while(b->getTurn() == 'X' ){
@@ -110,9 +111,13 @@ void Engine::AIGame(int difficulty){
 }
 
 void Engine::AI(int depth){
+	if (depth == -1)
+		depth = INT_MAX;
+	
 	Board* state = new Board(*b);
 	moves m;
-	MNode* root = new MNode(*state, m, 0);	
+	MNode* root = new MNode(*state, m, 0);
+	this->resetAB();
 	createMMTree(root, depth, 1);
 	m = evaluateMMTree(root);
 	
@@ -227,4 +232,9 @@ int Engine::evaluateMMBranch(MNode* node, int max, int min){
 		min = node->getMMVal();
 	
 	return max;
+}
+
+void Engine::resetAB(){
+	alpha = INT_MIN;
+	beta = INT_MAX;
 }

Engine.h

@@ -20,4 +20,5 @@ public:
 	void createMMTree(MNode* node, int depth, int alt);
 	moves evaluateMMTree(MNode* node);
 	int evaluateMMBranch(MNode* node, int max, int min);
+	void resetAB();
 };