fixed undo

Board.cpp

@@ -8,7 +8,7 @@
 using namespace std;
 
 Board::Board() {
-	Piece* temp; 
+	Piece* temp;
 	
 	for (int i = 0; i < 2; ++i) {	
 		for (int j = 0; j < 8; ++j) {
@@ -219,8 +219,8 @@ string Board::boardToString(){
 Board Board::move(moves m){
 	int row = m.row;
 	int column = m.column;
-	
 	Piece* piece;
+	
 	if (isPiece(row, column))
 		piece = getPiece(row, column);
 	
@@ -231,11 +231,13 @@ Board Board::move(moves m){
 	
 	if (piece->getType() != turn) {
 		cout<<"ERROR: attempting to move the wrong side's piece.\n"; 
+		return *this;
 	}
 	
 	else {
 		if(isThisMovePossible(row, column, m.moveType))
 		{
+			record.push_back(*this);
 			if (m.moveType == "FWD") {
 				piece->moveFwd();
 			}
@@ -282,6 +284,7 @@ Board Board::move(moves m){
 			}
 			setValidTrue();
 		}
+		
 		else
 		{
 			cout << "Invalid move.\n\n";
@@ -435,22 +438,18 @@ string Board::myToUpper(string input){
 	return output;	
 }
 
-void Board::undo(Board& tablero){
-	vector<Board> record;
-	
-	if (record.size() < 2){
-		cout<<"nothing to undo"<<endl;
+Board* Board::undo(){
+	//assuming this will only be called by a player, against an AI
+	if (record.size() == 0){
+		cout<< "ERROR: there is nothing to undo";
+		return this;
 	}
 	
 	else{
-		for (int r = 0; r < 8; ++r){
-			for (int k = 0; k < 8; ++k){
-				//tablero.modifyAt(r,k,(record[record.size()-2]).elementAt(r,k));
-			}
-		}	
-		
-		record.pop_back();
-	}	
+		Board* temp = new Board(record[record.size()-2]);
+		return temp;
+	}
+	
 }
 
 void Board::snapshot(vector<Board>& inputVec, Board inputBoard){

Board.h

@@ -28,12 +28,14 @@ class Board {
 	vector<Piece*> xpieces;
 	vector<Piece*> opieces;
 	vector<Piece*> pieces;
+	vector<Board> record;
 	bool valid, xtaken, otaken;
-	char turn = 'O'; 
+	char turn = 'O';
 	
 public:
 	Board();
 	Board(const Board& b);
+	vector<Board> getRecord() const{ return record; }
 	void setValidFalse(){ valid = false; }
 	void setValidTrue(){ valid = true; }
 	bool isValid(){ return valid; }
@@ -54,7 +56,7 @@ public:
 	bool isThisMovePossible(int r, int c, string moveType);
 	vector<moves> viewPossibleMoves();
 	string myToUpper(string input);
-	void undo(Board& tablero);
+	Board* undo();
 	void snapshot(vector<Board>& inputVec, Board inputBoard);
 	int evaluate(char max, char min);
 };

Engine.cpp

@@ -13,9 +13,11 @@ Engine::Engine(){
 	b = brd;
 	alpha = INT_MIN;
 	beta = INT_MAX;
+	undo_cnt = 0;
 }
 
 void Engine::startGame(){
+	undo_cnt = 0;
 	cout<<"WELCOME\n";
 	
 	cout<<"1. Play against AI?\n";

Engine.h

@@ -8,7 +8,7 @@ using namespace std;
 
 class Engine {
 	Board* b;
-	int alpha, beta;
+	int alpha, beta, undo_cnt;
 	
 public:
 	Engine();

Parser.cpp

@@ -29,19 +29,18 @@ string myToUpper(string input) {
 }
 
 void parseAndMove(vector<string> tokens, Board& board) {
-	//Debugging
 	int col;
 	int row;
 	
 	if(tokens[0].size() == 2) {
 		if(tokens[1].size() >= 3 && tokens[1].size() <= 5) {
 			if(tokens[0][0] - 'A' < 0 || tokens[0][0] - 'A' > 7) {
-				//cout << "Error. Invalid move location. (1st coord.)\n\n";
+				cout << "Error. Invalid move location. (1st coord.)\n\n";
 				cout << tokens[0][0] << " " << (tokens[0][0] - 'A') << "\n\n";
 				return;
 			}
 			else if(tokens[0][1] - '0' < 0 || tokens[0][1] - '0' > 7) {
-				//cout << "Error. Invalid move location. (1st coord.)\n\n";
+				cout << "Error. Invalid move location. (1st coord.)\n\n";
 				return;
 			}
 			else {
@@ -64,29 +63,23 @@ void parseAndMove(vector<string> tokens, Board& board) {
 		}
 	}
 	else {
-		//cout << "Error. Invalid move location. (size)\n\n";
+		cout << "Error. Invalid move location. (size)\n\n";
 		return;
 	}
 }
 
 void parseCmd(vector<string> tokens, Board& board) {
 	if(tokens[0] == "UNDO") {
-		//Debugging
-		//cout << "Testing UNDO.\n\n";
-		//Change when you fix undo.
-		board.undo(board);
+		board = *(board.undo());
 	}
 	
 	else if(tokens[0] == "DISPLAYRECORD") {
-		//Debugging
-		//cout << "Testing DISPLAYRECORD.\n\n";
-		/*Fix record, uncomment this.
-		cout << "recordsize: " << board->getRecord.size();
+		cout << "record size: " << board.getRecord().size();
+		vector<Board> record = board.getRecord();
 		
 		for(int i = 0; i < record.size(); ++i) {
 			record[i].displayBoard();
 		}
-		*/
 	}
 	
 	else {