Tic Tac Toe Game using C++
Tic-Tac-Toe Game
Write a program that allows two players to play a game of tic-tac-roc. Use a two dimensional
char army with three rows and three columns as the game board. Each
element of the array should be initialized with an asterisk (“). The program should fll n a
loop that
Displays the contents of the board array
Allows player 1 to select a location on the board for an X. The program should
ask the user to enter the row and column number.
Allows player 2 to select a location on the board for an O. The program should
ask the user to enter the row and column number.
Determines whether a p layer has won, or a tic has occurred. If a player has won,
the program should declare that player the winner and end. If a tie has occurred,
the pro~ram should say so and end .
Player 1 wins when there are three XS in a rowan the game board. The XS can appear
in a row, in a column, or diagonally across the board. A tic occurs when all of the
locations on the board are full, but there is no winner.
Answer:
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271 // Tic-Tac-Toe Game#include <iostream>using namespace std; // Constants for the rows and columnsconst int ROWS = 3;const int COLS = 3; // Function prototypesvoid displayBoard(char [][COLS]);void playerTurn(char [][COLS], char);bool gameOver(char [][COLS]);bool playerWins(char [][COLS], char);bool playerCanWin(char [][COLS], char);void displayWinner(char [][COLS]); int main(){ // Array for the game board. char gameBoard[ROWS][COLS] = { '*', '*', '*', '*', '*', '*', '*', '*', '*' }; do { // Display the game board. displayBoard(gameBoard); // Let player 1 have a turn. playerTurn(gameBoard, 'X'); // Display the game board again. displayBoard(gameBoard); // If the game is not over, let // player 2 have a turn. if (!gameOver(gameBoard)) playerTurn(gameBoard, 'O'); } while (!gameOver(gameBoard)); // Display the board one last time. displayBoard(gameBoard); // Display the winner. displayWinner(gameBoard); return 0;} //******************************************************// The displayBoard function displays the contents of *// the board. *//****************************************************** void displayBoard(char board[][COLS]){ // Display the column headings. cout << " Columns\n"; cout << " 1 2 3\n"; // Display the rows. for (int row = 0; row < ROWS; row++) { // Row label. cout << "Row " << (row + 1)<< ": "; // Row contents. for (int col = 0; col < COLS; col++) { cout << board[row][col] << " "; } cout << endl; }} //******************************************************// The playerTurn function allows a player (X or O) to *// take a turn. *//****************************************************** void playerTurn(char board[][COLS], char symbol){ // The isAvailable flag is set to true when the // player selects a location on the board that // is available. bool isAvailable = false; int row; // Row to place symbol int col; // column to place symbol // Prompt the player to enter a location. cout << "Player " << symbol << "'s turn.\n"; cout << "Enter a row and column to place an " << symbol << ".\n"; // Get and validate the location. while (!isAvailable) { // Get the row. cout << "Row: "; cin >> row; // Validate the row. while (row < 1 || row > ROWS) { cout << "Invalid Row!\n"; cout << "Row: "; cin >> row; } // Get the column. cout << "Column: "; cin >> col; // Validate the column. while (col < 1 || col > COLS) { cout << "Invalid Column!\n"; cout << "Column: "; cin >> col; } // Determine whether the selected // cell is available. if (board[row - 1][col - 1] == '*') isAvailable = true; else { cout << "That location is not available. " << "Select another location.\n"; } } // Place the player's symbol on the board // at the selected location. board[row - 1][col - 1] = symbol;} //****************************************************// The gameOver function returns true if the game *// is over. This is the case when either player has *// already won, or there is a tie. *//**************************************************** bool gameOver(char board[][COLS]){ // If either player has already won, game over. if (playerWins(board, 'X') || playerWins(board, 'O')) return true; // Otherwise, if either player CAN STILL win, game // NOT over. else if (playerCanWin(board, 'X') || playerCanWin(board, 'O')) return false; // Otherwise, it's a tie. Game over. else return true;} //***********************************************************// The playerWins function accepts the game board and *// a player symbol (X or O) as arguments. It returns *// true if the player has won. *//*********************************************************** bool playerWins(char board[][COLS], char symbol){ // Check the first horizontal row. if (board[0][0] == symbol && board[0][1] == symbol && board[0][2] == symbol) return true; // Check the second horizontal row. if (board[1][0] == symbol && board[1][1] == symbol && board[1][2] == symbol) return true; // Check the third horizontal row. if (board[2][0] == symbol && board[2][1] == symbol && board[2][2] == symbol) return true; // Check the first column. if (board[0][0] == symbol && board[1][0] == symbol && board[2][0] == symbol) return true; // Check the second column. if (board[0][1] == symbol && board[1][1] == symbol && board[2][1] == symbol) return true; // Check the third column. if (board[0][2] == symbol && board[1][2] == symbol && board[2][2] == symbol) return true; // Check the diagonal if (board[0][0] == symbol && board[1][1] == symbol && board[2][2] == symbol) return true; // If we make it this far, the player did not win. return false;} //*****************************************************// The playerCanWin function returns true if the *// player (X or O) can still win. *//***************************************************** bool playerCanWin(char board[][COLS], char symbol){ // Check the first horizontal row for a possibility. if ((board[0][0] == symbol || board[0][0] == '*') && (board[0][1] == symbol || board[0][1] == '*') && (board[0][2] == symbol || board[0][2] == '*')) return true; // Check the second horizontal row for a possibility. if ((board[1][0] == symbol || board[1][0] == '*') && (board[1][1] == symbol || board[1][1] == '*') && (board[1][2] == symbol || board[1][2] == '*')) return true; // Check the third horizontal row for a possibility. if ((board[2][0] == symbol || board[2][0] == '*') && (board[2][1] == symbol || board[2][1] == '*') && (board[2][2] == symbol || board[2][2] == '*')) return true; // Check the first column for a possibility. if ((board[0][0] == symbol || board[0][0] == '*') && (board[1][0] == symbol || board[1][0] == '*') && (board[2][0] == symbol || board[2][0] == '*')) return true; // Check the second column for a possibility. if ((board[0][1] == symbol || board[0][1] == '*') && (board[1][1] == symbol || board[1][1] == '*') && (board[2][1] == symbol || board[2][1] == '*')) return true; // Check the third column for a possibility. if ((board[0][2] == symbol || board[0][2] == '*') && (board[1][2] == symbol || board[1][2] == '*') && (board[2][2] == symbol || board[2][2] == '*')) return true; // Check the diagonal for a possibility. if ((board[0][0] == symbol || board[0][0] == '*') && (board[1][1] == symbol || board[1][1] == '*') && (board[2][2] == symbol || board[2][2] == '*')) return true; // If we make it this far, the player cannot win. return false;} //*****************************************************// The displayWinner function displays the winner. *//***************************************************** void displayWinner(char board[][COLS]){ if (playerWins(board, 'X')) cout << "Player 1 (X) WINS!!!!!\n\n"; else if (playerWins(board, 'O')) cout << "Player 2 (O) WINS!!!!!\n\n"; else cout << "Game Over... it's a TIE.\n\n";}
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