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#include <iostream>
#include <vector>
#include <iomanip>
#include <string>
using namespace std;
// Change these to match your letters
const char L = 'L';
const char U = 'U';
const int SIZE = 3;
// For testing we might change this to 5 or 7,our code should still work
const int MAXMOVES = SIZE*SIZE;
// The max number of moves is the size of the SIZE by SIZE grid
const int WID = 3;
// can help to align the board
int getNumber(string prompt, int range) {
if (range > 1) {
int num = 0;
while ((num < 1) || (num >(range))) {
cout << prompt << " (";
for (int i = 0; i < range; ++i) {
cout << (i + 1) << " ";
}
cout << "): ";
cin >> num;
if (cin.fail()) {
cin.clear(); // unset failbit
cin.ignore(numeric_limits<streamsize>::max(), '\n'); // skip bad input
cout << "Must be between 1 and " << SIZE << "." << endl;
}
cout << endl;
}
return num - 1;
}
else if (range == 1) {
return 0;
}
return -1;
}
int getNum(string prompt) {
int num = 0;
bool done = false;
while (!done) {
cout << prompt << " ";
if (cin >> num) {
done = true;
}
if (cin.fail()) {
cin.clear(); // unset failbit
cin.ignore(numeric_limits<streamsize>::max(), '\n'); // skip bad input
cout << "Must be an integer." << endl;
}
}
return num;
}
void doSeed() {
int seedVal = -1;
char inputSeed = 'n'; // asks user if they want to input the random seed
cout << "Input Seed? (y/n) ";
cin >> inputSeed;
cout << endl;
if (inputSeed == 'y') {
seedVal = getNum("Seed: ");
}
// set seed for random numbers
if (inputSeed != 'y' || seedVal < 0) { // seed value must be positive,
// so if you get a negative value, just use time
srand(time(NULL));
}
else {
srand(seedVal);
}
cin.clear(); // unset failbit
cin.ignore(numeric_limits<streamsize>::max(), '\n'); // skip bad input
}
/*
Function: userMove
Query the user for row and column for their move
Ask repeatedly/loop until they choose a location that is still empty
Mark the location with the user's symbol
Use the getNumber function to get the row and column values
exit loop
*/
void userMove(vector< vector<char> >& board) { //remove for exam
bool done = false;
while (!done) {
int i = getNumber("Which row? ", SIZE);
int j = getNumber("Which column? ", SIZE);
if (board.at(i).at(j) == '_') {
done = true;
board.at(i).at(j) = L;
}
else {
cout << "(" << (i + 1) << ", " << (j + 1) << ") already taken." << endl;
}
}
}
/*
Write this function
Function: computerMove
Randomly create a row and column in the range of the board
Repeat/loop until a location is found that is still empty
Mark the location with the computer's symbol
exit loop
*/
void computerMove(vector< vector<char> >board) {
bool done = false;
while (!done) {
int i = rand() % 3;
int j = rand() % 3;
if (board.at(i).at(j) == 'L' || board.at(i).at(j) == 'U') {
done = false;
}
else {
board.at(i).at(j) = 'L';
}
}
}
/*
Write this function
Function: printBoard
outputs the content of the board in a SIZE by SIZE grid
_ _ X
O _ X
_ O _
*/
void printBoard(vector<vector<char>>& board) {
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < SIZE; j++) {
cout << " " << board.at(i).at(j);
;
}
cout << endl;
}
cout << endl;
}
/*
Write this function
Function checkRow
Check to see if the character passed in is the
character all the way across a row.
If it is a win, return true
otherwise, return false
*/
bool checkRow(vector< vector<int> >& board, vector<int> called) {
bool rowWon = false;
int i = 0;
while (!rowWon && i < SIZE) {
rowWon = true;
int j = 0;
while (rowWon && j < SIZE) {
if (called.at(board.at(i).at(j) - 1) == 0) {
rowWon = false;
}
++j;
}
++i;
}
return rowWon;
}
/*
Write this function
Function checkColumn
Check to see if the character passed in is the
character all the way down a column.
If it is a win, return true
otherwise, return false
*/
bool checkCol(vector< vector<int> >& board, vector<int> called) {
bool colWon = false;
int j = 0;
while (!colWon && j < SIZE) {
colWon = true;
int i = 0;
while (colWon && i < SIZE) {
if (called.at(board.at(i).at(j) - 1) == 0) {
colWon = false;
++i;
}
++j;
}
return colWon;
}
}
/*
Write this function
Function checkDiag
Check to see if the character passed in is the
character all the way across a diagonal.
The diagonals are from top-left to bottom-right,
and from bottom-left to top-right.
If it is a win, return true
otherwise, return false
*/
bool checkDiag(vector< vector<int> >& board, vector<int> called) {
// check diagonal top-left to bottom-right
int i = 0; // i is both the row AND the column
bool diagWon = true;
while (diagWon && i < SIZE) {
if (called.at(board.at(i).at(i) - 1) == 0) {
diagWon = false;
}
++i;
}
if (diagWon) { // no need to check further if won
return diagWon;
}
// check diagonal bottom-left to top-right
i = 0; // row is i, column is last index minus i
diagWon = true;
while (diagWon && i < SIZE) {
if (called.at(board.at(i).at(SIZE - 1 - i) - 1) == 0) {
// checks 0,4; 1,3; 2,2; 3,1; 4,0
diagWon = false;
}
++i;
}
return diagWon;
}
bool checkWin(vector< vector<char> >& board, vector<int> called) {
return checkRow(board, called) || checkCol(board, called) || checkDiag(board, called);
}
bool checkCat(int moves) { // i.e. a tie, no more moves to make
if (moves == MAXMOVES) {
return true;
}
return false;
}
char getWinner(vector< vector<char> >& board, int moves) {
if (checkWin(board, L)) { // see if user wins
return L;
}
if (checkWin(board, U)) { // see if computer wins
return U;
}
// if no winner yet... check and see if it is a tie game / cat
if (checkCat(moves)) {
return 'c';
}
// Neither player is a winner and not a tie game so return the blank
// location symbol '_'
return '_';
}
int main() {
char playAgain = 'y';
while (playAgain == 'y') {
doSeed();
vector< vector<char> > board(SIZE, vector<char>(SIZE, '_'));
// initializes the vector with '_' (underscore)
// this allows to blank locations to be visible
cout << "Welcome to Tic Tac Toe" << endl << endl;
printBoard(board);
// use a char instead of a boolean
// when a winner is found, their symbol will be used to indicate
// not only that there is a winner, but who won
char winner = '_';
// no winner until assigned with appropriate symbol for user or computer
int moves = 0;
// we have to count moves so we don't get stuck once we run out
// , i.e. fill up the board
// if we look for a move when there isn't one, we will end up
// in an infinite loop
while (winner == '_') { // repeat/loop until there is a winner
// or cat (i.e. a tie)
if (moves < MAXMOVES) { // only let the user fill a square if there is
// still one empty
userMove(board);
moves++;
}
if (moves < MAXMOVES) { // only let the computer fill a square if there is
// still one empty
computerMove(board);
moves++;
}
printBoard(board);
winner = getWinner(board, moves);
// set to the winner's symbol or 'c' if cat (i.e. a tie)
}
// once we get here a winner was found so
if (winner == 'c') { // tie
cout << "CAT!" << endl;
}
else { // winner
cout << winner << " Won!!!" << endl;
}
cout << endl << "Play again? (y/n) ";
cin >> playAgain;
cin.clear(); // unset failbit
cin.ignore(numeric_limits<streamsize>::max(), '\n'); // skip bad input
playAgain = tolower(playAgain);
}
system("pause");
}
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