1. #include <iostream>
2. #include <vector>
3.  
4. using namespace std;
5.  
6. void printBoard(const vector<vector<char>>& board) {
7.     cout << "     0   1   2\n";
8.     cout << "   -------------\n";
9.     for (int i = 0; i < 3; i++) {
10.         cout << i << "  | " << board[i][0] << " | " << board[i][1] << " | " << board[i][2] << " |" << endl;
11.         cout << "   -------------\n";
12.     }
13. }
14.  
15. bool isWin(const vector<vector<char>>& board, char player) {
16.     for (int i = 0; i < 3; i++) {
17.         if (board[i][0] == player && board[i][1] == player && board[i][2] == player) return true;
18.         if (board[0][i] == player && board[1][i] == player && board[2][i] == player) return true;
19.     }
20.     if (board[0][0] == player && board[1][1] == player && board[2][2] == player) return true;
21.     if (board[0][2] == player && board[1][1] == player && board[2][0] == player) return true;
22.     return false;
23. }
24.  
25. bool isBoardFull(const vector<vector<char>>& board) {
26.     for (const auto& row : board) {
27.         for (char cell : row) {
28.             if (cell == ' ') return false;
29.         }
30.     }
31.     return true;
32. }
33.  
34. bool placeMarker(int row, int col, vector<vector<char>>& board, char marker) {
35.     if (board[row][col] == ' ') {
36.         board[row][col] = marker;
37.         return true;
38.     }
39.     return false;
40. }
41.  
42. int main() {
43.     vector<vector<char>> board(3, vector<char>(3, ' '));
44.     char turn = 'X';
45.     int row, col;
46.     bool gameEnded = false;
47.  
48.     while (!gameEnded) {
49.         printBoard(board);
50.         cout << "Player " << turn << ", enter row and column to place your marker: ";
51.         cin >> row >> col;
52.  
53.         if (row < 0 || row >= 3 || col < 0 || col >= 3) {
54.             cout << "Invalid position! Try again.\n";
55.             continue;
56.         }
57.  
58.         if (!placeMarker(row, col, board, turn)) {
59.             cout << "This position is already occupied! Try again.\n";
60.             continue;
61.         }
62.  
63.         if (isWin(board, turn)) {
64.             printBoard(board);
65.             cout << "Player " << turn << " wins!\n";
66.             gameEnded = true;
67.         } else if (isBoardFull(board)) {
68.             printBoard(board);
69.             cout << "It's a draw!\n";
70.             gameEnded = true;
71.         } else {
72.             turn = (turn == 'X') ? 'O' : 'X';
73.         }
74.     }
75.  
76.     return 0;
77. }