Tic-tac-toe is a paper-and-pencil game for two players who take turns
marking the spaces in a three-by-three grid with X or O. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is the winner.
It is a solved game, with a forced draw assuming best play from both players.
#include<bits/stdc++.h>
using namespace std;
//Array for the board
char board[3][3] = {{'1', '2', '3'}, {'4', '5', '6'}, {'7', '8', '9'}};
//Variable Declaration
int choice;
int row, column;
char turn = 'X';
bool draw = false;
//Function to show the current status of the gaming board
void display_board() {
//Rander Game Board LAYOUT
cout << "PLAYER - 1 [X]t PLAYER - 2 [O]nn";
cout << "tt | | n";
cout << "tt " << board[0][0] << " | " << board[0][1] << " | " << board[0][2] << " n";
cout << "tt_____|_____|_____n";
cout << "tt | | n";
cout << "tt " << board[1][0] << " | " << board[1][1] << " | " << board[1][2] << " n";
cout << "tt_____|_____|_____n";
cout << "tt | | n";
cout << "tt " << board[2][0] << " | " << board[2][1] << " | " << board[2][2] << " n";
cout << "tt | | n";
}
//Function to get the player input and update the board
void player_turn() {
if (turn == 'X') {
cout << "ntPlayer - 1 [X] turn : ";
}
else if (turn == 'O') {
cout << "ntPlayer - 2 [O] turn : ";
}
//Taking input from user
//updating the board according to choice and reassigning the turn Start
cin >> choice;
//switch case to get which row and column will be update
switch (choice) {
case 1: row = 0; column = 0; break;
case 2: row = 0; column = 1; break;
case 3: row = 0; column = 2; break;
case 4: row = 1; column = 0; break;
case 5: row = 1; column = 1; break;
case 6: row = 1; column = 2; break;
case 7: row = 2; column = 0; break;
case 8: row = 2; column = 1; break;
case 9: row = 2; column = 2; break;
default:
cout << "Invalid Move";
}
if (turn == 'X' && board[row][column] != 'X' && board[row][column] != 'O') {
//updating the position for 'X' symbol if
//it is not already occupied
board[row][column] = 'X';
turn = 'O';
} else if (turn == 'O' && board[row][column] != 'X' && board[row][column] != 'O') {
//updating the position for 'O' symbol if
//it is not already occupied
board[row][column] = 'O';
turn = 'X';
} else {
//if input position already filled
cout << "Box already filled!n Please choose another!!nn";
player_turn();
}
/* Ends */
display_board();
}
//Function to get the game status e.g. GAME WON, GAME DRAW GAME IN CONTINUE MODE
bool gameover() {
//checking the win for Simple Rows and Simple Column
for (int i = 0; i < 3; i++)
if (board[i][0] == board[i][1] && board[i][0] == board[i][2] || board[0][i] == board[1][i] && board[0][i] == board[2][i])
return false;
//checking the win for both diagonal
if (board[0][0] == board[1][1] && board[0][0] == board[2][2] || board[0][2] == board[1][1] && board[0][2] == board[2][0])
return false;
//Checking the game is in continue mode or not
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
if (board[i][j] != 'X' && board[i][j] != 'O')
return true;
//Checking the if game already draw
draw = true;
return false;
}
//Program Main Method
int main()
{
cout << "tttT I C K -- T A C -- T O E -- G A M Ettt";
cout << "nttttFOR 2 PLAYERSnttt";
while (gameover()) {
display_board();
player_turn();
gameover();
}
if (turn == 'X' && draw == false) {
cout << "nnCongratulations!Player with 'X' has won the game";
}
else if (turn == 'O' && draw == false) {
cout << "nnCongratulations!Player with 'O' has won the game";
}
else
cout << "nnGAME DRAW!!!nn";
}