The document provides suggestions to fix errors in code for a Tic Tac Toe game: 1) On line 23, replace the check for cells 0 and 1 with a check that both cells equal 'x'. 2) On line 29, close the loop bracket before the line starting with bool tie(). 3) Line 37 error will be resolved by the above changes as main's scope is not predefined. 4) On line 69, remove the excess bracket. Additional input handling is needed as player choices are not defined. Sample code is provided to get input and play the game.

1. Please follow the data :
1) For Line 23 :
In the IF - Condition you are just checking the cells of the grid at positions 0 and 1. But I
suppose you would like to check if both the cells are having the character value 'x'. So to
achieve this you need to replace the code with
if(grid[0] == grid[1] == 'x')
2) For Line 29 :
The error is that the function has been define before the error line and the loop has not been
closed so pplace a closing brackets for the loop before the line starting with bool tie()
3) For Line 37 :
The above change should also resolve this as the scope of the main function isnt predefined.
4) For Line 69 :
Remove the excess bracket at the end of the code.
Even after replacing these I suppose your code would not work as the input has not been defined
from where and how thw user can get the data to the code. So to avoid this I am placing my
code.
Please follow the code and comments for descripiton :
CODE :
#include
using namespace std;
int checkWin( char[]); // rewuired variables
void grid( char[]);
int main()
{
char cell[10] = {'o','1','2','3','4','5','6','7','8','9'}; // placing the cell names
int player = 1,i,choice; // initialisations
char symbol;
do // looping to get the player choices
{
grid(cell);
if(player%2==1) { // checking for the player
player=1;
} else {
player=2;
}

2. // player 2 is the computer
if(player==2) // if is a player 2
{
cout << "Player " << player<> choice;
symbol='X';
if (choice == 1 && cell[1] == '1') {
cell[1] = symbol;
}
else if (choice == 2 && cell[2] == '2') {
cell[2] = symbol;
}
else if (choice == 3 && cell[3] == '3') {
cell[3] = symbol;
}
else if (choice == 4 && cell[4] == '4') {
cell[4] = symbol;
}
else if (choice == 5 && cell[5] == '5') {
cell[5] = symbol;
}
else if (choice == 6 && cell[6] == '6') {
cell[6] = symbol;
}
else if (choice == 7 && cell[7] == '7') {
cell[7] = symbol;
}
else if (choice == 8 && cell[8] == '8') {
cell[8] = symbol;
}
else if (choice == 9 && cell[9] == '9') {
cell[9] = symbol;
} else {
cout<<"Invalid move..!!!"<< endl;
player--;
exit(0);

3. }
i=checkWin(cell);
player++;
}
} while(i==-1);
grid(cell);
if(i==1) {
cout<<"Congratulations! Player "<<--player<<" won the Game..!!";
} else {
cout<<" OOPS..!!!! The Game has been tie..!!";
}
exit(0);
return 0;
}
void grid(char cell[]) // printing the grid everytime the user has placed the symbol
{
system("cls");
cout << " tTic Tac Toe Game ";
cout << "Player 1 (X) - Player 2 (O)" << endl << endl;
cout << endl;
cout << " | | " << endl;
cout << " " << cell[1] << " | " << cell[2] << " | " << cell[3] << endl;
cout << "_____|_____|_____" << endl;
cout << " | | " << endl;
cout << " " << cell[4] << " | " << cell[5] << " | " << cell[6] << endl;
cout << "_____|_____|_____" << endl;
cout << " | | " << endl;
cout << " " << cell[7] << " | " << cell[8] << " | " << cell[9] << endl;
cout << " | | " << endl << endl;
}
int checkWin(char cell[])// checking for the win condition
{
if (cell[1] == cell[2] && cell[2] == cell[3]) {
return 1;
}

4. else if (cell[4] == cell[5] && cell[5] == cell[6]) {
return 1;
}
else if (cell[7] == cell[8] && cell[8] == cell[9]) {
return 1;
}
else if (cell[1] == cell[4] && cell[4] == cell[7]) {
return 1;
}
else if (cell[2] == cell[5] && cell[5] == cell[8]) {
return 1;
}
else if (cell[3] == cell[6] && cell[6] == cell[9]) {
return 1;
}
else if (cell[1] == cell[5] && cell[5] == cell[9]) {
return 1;
}
else if (cell[3] == cell[5] && cell[5] == cell[7]) {
return 1;
}
else if (cell[1] != '1' && cell[2] != '2' && cell[3] != '3'
&& cell[4] != '4' && cell[5] != '5' && cell[6] != '6'
&& cell[7] != '7' && cell[8] != '8' && cell[9] != '9') {
return 0;
}
else {
return -1;
}
}
OUTPUT :
1) For a Tie Game Case :
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |

5. 1 | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
7 | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol :
7
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
1 | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |

6. X | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 5
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | 3
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | O

7. _____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | O
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 2
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!

8. Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
4 | X | O
_____|_____|_____
| |
X | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
4 | X | O
_____|_____|_____
| |
X | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 4
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |

9. X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | O | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | O | 9
| |
Player 1, Please enter the grid number to place the symbol : 9
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O

10. _____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | O | X
| |
OOPS..!!!!
The Game has been tie..!!
2) For Win Case :
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
1 | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
7 | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 1
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
7 | 8 | 9

11. | |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
O | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
O | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 2
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | 3
_____|_____|_____

12. | |
4 | 5 | 6
_____|_____|_____
| |
O | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | 3
_____|_____|_____
| |
4 | O | 6
_____|_____|_____
| |
O | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | 3
_____|_____|_____
| |
4 | O | 6
_____|_____|_____
| |
O | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 3
Tic Tac Toe Game

13. Player 1 (X) - Player 2 (O)
| |
X | X | X
_____|_____|_____
| |
4 | O | 6
_____|_____|_____
| |
O | 8 | 9
| |
Congratulations!
Player 1 won the Game..!!
Hope this is helpful.
Solution
Please follow the data :
1) For Line 23 :
In the IF - Condition you are just checking the cells of the grid at positions 0 and 1. But I
suppose you would like to check if both the cells are having the character value 'x'. So to
achieve this you need to replace the code with
if(grid[0] == grid[1] == 'x')
2) For Line 29 :
The error is that the function has been define before the error line and the loop has not been
closed so pplace a closing brackets for the loop before the line starting with bool tie()
3) For Line 37 :
The above change should also resolve this as the scope of the main function isnt predefined.
4) For Line 69 :
Remove the excess bracket at the end of the code.
Even after replacing these I suppose your code would not work as the input has not been defined
from where and how thw user can get the data to the code. So to avoid this I am placing my
code.
Please follow the code and comments for descripiton :
CODE :
#include

14. using namespace std;
int checkWin( char[]); // rewuired variables
void grid( char[]);
int main()
{
char cell[10] = {'o','1','2','3','4','5','6','7','8','9'}; // placing the cell names
int player = 1,i,choice; // initialisations
char symbol;
do // looping to get the player choices
{
grid(cell);
if(player%2==1) { // checking for the player
player=1;
} else {
player=2;
}
// player 2 is the computer
if(player==2) // if is a player 2
{
cout << "Player " << player<> choice;
symbol='X';
if (choice == 1 && cell[1] == '1') {
cell[1] = symbol;
}
else if (choice == 2 && cell[2] == '2') {
cell[2] = symbol;
}
else if (choice == 3 && cell[3] == '3') {
cell[3] = symbol;
}
else if (choice == 4 && cell[4] == '4') {
cell[4] = symbol;
}
else if (choice == 5 && cell[5] == '5') {
cell[5] = symbol;

15. }
else if (choice == 6 && cell[6] == '6') {
cell[6] = symbol;
}
else if (choice == 7 && cell[7] == '7') {
cell[7] = symbol;
}
else if (choice == 8 && cell[8] == '8') {
cell[8] = symbol;
}
else if (choice == 9 && cell[9] == '9') {
cell[9] = symbol;
} else {
cout<<"Invalid move..!!!"<< endl;
player--;
exit(0);
}
i=checkWin(cell);
player++;
}
} while(i==-1);
grid(cell);
if(i==1) {
cout<<"Congratulations! Player "<<--player<<" won the Game..!!";
} else {
cout<<" OOPS..!!!! The Game has been tie..!!";
}
exit(0);
return 0;
}
void grid(char cell[]) // printing the grid everytime the user has placed the symbol
{
system("cls");
cout << " tTic Tac Toe Game ";
cout << "Player 1 (X) - Player 2 (O)" << endl << endl;
cout << endl;

16. cout << " | | " << endl;
cout << " " << cell[1] << " | " << cell[2] << " | " << cell[3] << endl;
cout << "_____|_____|_____" << endl;
cout << " | | " << endl;
cout << " " << cell[4] << " | " << cell[5] << " | " << cell[6] << endl;
cout << "_____|_____|_____" << endl;
cout << " | | " << endl;
cout << " " << cell[7] << " | " << cell[8] << " | " << cell[9] << endl;
cout << " | | " << endl << endl;
}
int checkWin(char cell[])// checking for the win condition
{
if (cell[1] == cell[2] && cell[2] == cell[3]) {
return 1;
}
else if (cell[4] == cell[5] && cell[5] == cell[6]) {
return 1;
}
else if (cell[7] == cell[8] && cell[8] == cell[9]) {
return 1;
}
else if (cell[1] == cell[4] && cell[4] == cell[7]) {
return 1;
}
else if (cell[2] == cell[5] && cell[5] == cell[8]) {
return 1;
}
else if (cell[3] == cell[6] && cell[6] == cell[9]) {
return 1;
}
else if (cell[1] == cell[5] && cell[5] == cell[9]) {
return 1;
}
else if (cell[3] == cell[5] && cell[5] == cell[7]) {
return 1;

17. }
else if (cell[1] != '1' && cell[2] != '2' && cell[3] != '3'
&& cell[4] != '4' && cell[5] != '5' && cell[6] != '6'
&& cell[7] != '7' && cell[8] != '8' && cell[9] != '9') {
return 0;
}
else {
return -1;
}
}
OUTPUT :
1) For a Tie Game Case :
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
1 | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
7 | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol :
7
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
1 | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____

18. | |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
X | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 5
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |

19. O | 2 | 3
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | O
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | 2 | O
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 2

20. Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
4 | X | 6
_____|_____|_____
| |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
4 | X | O
_____|_____|_____
| |
X | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
4 | X | O

21. _____|_____|_____
| |
X | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 4
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | O | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)

22. | |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | O | 9
| |
Player 1, Please enter the grid number to place the symbol : 9
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
O | X | O
_____|_____|_____
| |
X | X | O
_____|_____|_____
| |
X | O | X
| |
OOPS..!!!!
The Game has been tie..!!
2) For Win Case :
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
1 | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____

23. | |
7 | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 1
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
7 | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
O | 8 | 9
| |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |

24. X | 2 | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
O | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 2
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | 3
_____|_____|_____
| |
4 | 5 | 6
_____|_____|_____
| |
O | 8 | 9
| |
Player 2
Press Enter for the Computer Turn..!!
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | 3
_____|_____|_____
| |
4 | O | 6
_____|_____|_____
| |
O | 8 | 9

25. | |
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | 3
_____|_____|_____
| |
4 | O | 6
_____|_____|_____
| |
O | 8 | 9
| |
Player 1, Please enter the grid number to place the symbol : 3
Tic Tac Toe Game
Player 1 (X) - Player 2 (O)
| |
X | X | X
_____|_____|_____
| |
4 | O | 6
_____|_____|_____
| |
O | 8 | 9
| |
Congratulations!
Player 1 won the Game..!!
Hope this is helpful.