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I am having an issue in my code I can't seem to figure out. I stopped when I realized there was an error. It is in the boolean function below. The bracket is giving me an error and I am not sure what I have double checked and all of my brackets match up so not sure what the problem is.
Code:
//Tic-Tac-Toe
//Plays the game of tic-tac-toe against a human opponent
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
//global constant
const char X = 'X';
const char O = 'O';
const char EMPTY = ' ';
const char TIE = 'T';
const char NO_ONE = 'N';
//function prototypes
void instuctions();
char askYesNo(string question);
int askNumber(string question, int high, int low=0);
char humanPiece();
char opponent(char piece);
void displayBoard(const vector<char>& board);
char winner(const vector<char>& board);
bool isLegal(const vector<char>& board, int move);
int humanMove(const vector<char>& board, char human);
int computerMove(vector<char> board, char computer);
void announceWInner(char winner, char computer, char human);
//main function
int main() {
}//end of main
//instructions
void instructions() {
cout << "Welcome to the ultimate man-machine showdown!!. Tic-Tac-Toc,"<<endl;
cout << "--where human brain is pit against silicon processor."<<endl;
cout <<"\nMake your move known by entering a number, 0 - 8. The number"<<endl;
cout <<"corresponds to the desired board position, as illustrated:\n\n";
cout <<" 0 | 1 | 2"<<endl;
cout <<" ---------"<<endl;
cout <<" 3 | 4 | 5"<<endl;
cout <<" ---------"<<endl;
cout <<" 6 | 7 | 8"<<endl;
cout <<"Prepare yourself, human, The battle isabout to begin.\n"<<endl;
}//end instructions
char askYesNo(string question) {
char response;
do {
cout << question << "(y/n): ";
cin >> response;
}while (response != 'y' && response != 'n');
}//end of askYesNo
int askNumber(string question, int high, int low) {
int number;
do {
cout << question << " (" << low << " - " <<high <<"): ";
cin >> number;
}while (number > high || number < low);
return number;
}//end of askNumber
char humanPiece() {
char go_first = askYesNo("Do you require the first move?");
if(go_first == 'y') {
cout <<"\nThen take the first move. You will need it.\n";
return X;
}
else {
cout <<"\nYour bravery will be your undoing... I will go first.\n";
return O;
}
}//end of humanPiece
char opponent(char piece) {
if(piece == X) {
return O;
}
else {
return X;
}
}//end of opponent
void displayBoard(const vector<char>& board) {
cout << "\n\t" << board[0] << " | " << board[1] << " | " <<board[2];
cout << "\n\t" << "----------";
cout << "\n\t" << board[3] << " | " << board[4] << " | " <<board[5];
cout << "\n\t" << "----------";
cout << "\n]t" << board[6] << " | " << board[7] << " | " <<board[8];
cout <<"\n\n";
}//end of display board
char winner(const vector<char>& board) {
//all possible winning rows
const int WINNING_ROWS[8][3] = { {0, 1, 2},
{3, 4, 5},
{6, 7, 8},
{0, 3, 6},
{1, 4, 7},
{2, 5, 8},
{0, 4, 8},
{2, 4, 6} };
const int TOTAL_ROWS = 8;
//if any winning row has three values that are the same (and not EMPTY)
//then we have a winner
for (int row = 0; row < TOTAL_ROWS; ++row) {
if ( (board[WINNING_ROWS[row][0]] != EMPTY) && (board[WINNING_ROWS[row][0]] == board[WINNING_ROWS[row][1]]) && (board[WINNING_ROWS[row][1]] == board[WINNING_ROWS[row][2]]) )
{
return board[WINNING_ROWS[row][0]];
}
//since nobody has won, check for a tie (no empty squares left)
if(count(board.begin(), board.end(), EMPTY) == 0) {
return TIE;
}
else {
return NO_ONE;
}
}//end of winner
bool isLegal(const vector<char>& board, int move)
{ //error here with this bracket
return (board[move] == EMPTY);
}//end of isLegal function
int humanMove(const vector<char>& board, char human) {
int move = askNumber("Where will you move?", (board.size() - 1));
return move;
}//end of human Move