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There is a problem with thecode. I get the error messages " 'board' was not declared...

There is a problem with thecode. I get the error messages

" 'board' was not declared in this scope",

\src\TicTacToe.cpp|7|error: expected unqualified-id before ')' token|

\src\TicTacToe.cpp|100|error: expected declaration before '}' token|

Here is the code

#ifndef TICTACTOE_H
#define TICTACTOE_H
#include

class TicTacToe {
private: char board [3][3];
public:
TicTacToe () {}
void printBoard();
void computerTurn(char ch);
bool playerTurn (char ch);
char winVerify();

};

************************************

TicTacToe.cpp

#endif // TICTACTOE_H

#include "TicTacToe.h"

#include

#include

using namespace std;

TicTacToe() {
for(int i = 0; i < 3; i++)
for (int j = 1; j < 3; j++)
board[i][j] = '0' + i*3 + j + 1;
}

void printBoard() {
for(int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++)
if (j != 2)
cout << board[i][j] << "|";
else
cout << board[i][j];
cout << endl;
for (int j = 0; j < 5 && i != 2; j++)
cout << "-";
cout << endl;
}
}

void computerTurn(char ch) {
if (ch != 'X' && ch != 'O') {
cout << "INVALID SYMBOL" << endl;
exit(1);
}
int i,j;
do {
i = rand() % 3;
j = rand() % 3;
} while (board[i][j] == 'O' || board[i][j] == 'X' );

board[i][j] = ch;
}

void playerTurn(char ch) {
if (ch != 'X' && ch != 'O') {
cout << "INVALID SYMBOL" << endl;
exit(1);
}
cout << "Enter a position: ";
int pos;
cin >> pos;
int i = pos/3;
int j = pos%3;
while (i < 0 || i > 2) {
cout << "Invalid position\nEnter a valid position: ";
cin >> pos;
i = pos/3;
j = pos%3;
}
board[i][j] = ch;
}

char winVerify() {
int i, j;

for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++)
if (board[i][j] != 'X')
break;
if (j == 3)
return 'X';

for (j = 0; j < 3; j++)
if (board[i][j] != 'O')
break;
if (j == 3)
return 'O';


for (j = 0; j < 3; j++)
if (board[j][i] != 'X')
break;
if (j == 3)
return 'X';

for (j = 0; j < 3; j++)
if (board[j][i] != 'O')
break;
if (j == 3)
return 'O';

}

if (board[0][0] == board[1][1] == board[2][2])
return board[1][1];


if (board[0][2] == board[1][1] == board[2][0])
return board[1][1];

return 0;
};
};

**************************Main.cpp

#include "TicTacToe.h"
#include
#include


using namespace std;

int main(int argc, char const *argv[])
{
int choice;
int count;
char winner = 0;
TicTacToe board1;
do {
cout << "0. Computer plays first" << endl;
cout << "1. User plays first" << endl;
cout << "Enter choice: " ;
cin >> choice;
} while(choice < 0 || choice > 1);

char comp;
char user;
if (choice == 0) {
comp = 'X';
user = 'O';
}
else {
comp = 'O';
user = 'X';
}

for (count = 0; count < 9 && winner == 0; count ++) {
board1.printBoard();
if (count % 2 == choice)
board1.computerTurn(comp);
else
board1.playerTurn(user);

winner = board1.winVerify();
}

if (winner == 0) {
cout << "DRAW" << endl;
}
else if (winner == comp) {
cout << "Computer wins" << endl;
}
else {
cout << "YOU won" << endl;
}
return 0;
}

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Homework Answers

Answer #1

Main.cpp:-
---------------------------------
#include "TicTacToe.h"
#include "TicTacToe.cpp"
#include<iostream>
using namespace std;
int main(int argc, char const *argv[])
{
int choice;
int count;
char winner = 0;
TicTacToe board1;
do
{
cout << "0. Computer plays first" << endl;
cout << "1. User plays first" << endl;
cout << "Enter choice: " ;
cin >> choice;
} while(choice < 0 || choice > 1);
char comp;
char user;
if (choice == 0)
{
comp = 'X';
user = 'O';
}
else
{
comp = 'O';
user = 'X';
}
for (count = 0; count < 9 && winner == 0; count ++)
{
board1.printBoard();
if (count % 2 == choice)
board1.computerTurn(comp);
else
board1.playerTurn(user);
winner = board1.winVerify();
}
if (winner == 0)
{
cout << "DRAW" << endl;
}
else if (winner == comp)
{
cout << "Computer wins" << endl;
}
else
{
cout << "YOU won" << endl;
}
return 0;
}

TicTacToe.cpp:-
--------------------------------
#include "TicTacToe.h"
#include<iostream>
#include<stdlib.h>
using namespace std;
TicTacToe::TicTacToe()
{
for(int i = 0; i < 3; i++)
for (int j = 1; j < 3; j++)
board[i][j] = '0' + i*3 + j + 1;
}
void TicTacToe::printBoard()
{
for(int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
if (j != 2)
cout << board[i][j] << "|";
else
cout << board[i][j];
cout << endl;
for (int j = 0; j < 5 && i != 2; j++)
cout << "-";
cout << endl;
}
}
void TicTacToe::computerTurn(char ch)
{
if (ch != 'X' && ch != 'O')
{
cout << "INVALID SYMBOL" << endl;
exit(1);
}
int i,j;
do
{
i = rand() % 3;
j = rand() % 3;
} while (board[i][j] == 'O' || board[i][j] == 'X' );
board[i][j] = ch;
}
bool TicTacToe::playerTurn(char ch)
{
if (ch != 'X' && ch != 'O')
{
cout << "INVALID SYMBOL" << endl;
exit(1);
}
cout << "Enter a position: ";
int pos;
cin >> pos;
int i = pos/3;
int j = pos%3;
while (i < 0 || i > 2)
{
cout << "Invalid position\nEnter a valid position: ";
cin >> pos;
i = pos/3;
j = pos%3;
}
board[i][j] = ch;
}
char TicTacToe::winVerify()
{
int i, j;
for (i = 0; i < 3; i++)
{
for (j = 0; j < 3; j++)
if (board[i][j] != 'X')
break;
if (j == 3)
return 'X';
for (j = 0; j < 3; j++)
if (board[i][j] != 'O')
break;
if (j == 3)
return 'O';
for (j = 0; j < 3; j++)
if (board[j][i] != 'X')
break;
if (j == 3)
return 'X';
for (j = 0; j < 3; j++)
if (board[j][i] != 'O')
break;
if (j == 3)
return 'O';
}
if (board[0][0] == board[1][1] == board[2][2])
return board[1][1];
if (board[0][2] == board[1][1] == board[2][0])
return board[1][1];
return 0;
}

TicTacToe.h:-
---------------------------
#ifndef TICTACTOE_H
#define TICTACTOE_H
#include<iostream>
class TicTacToe
{
private: char board[3][3];
public:
TicTacToe();
void printBoard();
void computerTurn(char ch);
bool playerTurn (char ch);
char winVerify();
};
#endif // TICTACTOE_H


Sample Output:-
-------------------------------
0. Computer plays first
1. User plays first
Enter choice: 16
0. Computer plays first
1. User plays first
Enter choice: 1
3|2|3
-----
|5|6
-----
|8|9
Enter a position: 15
Invalid position
Enter a valid position: 6
3|2|3
-----
|5|6
-----
X|8|9
3|2|3
-----
|5|6
-----
X|8|O
Enter a position: 1
3|X|3
-----
|5|6
-----
X|8|O
3|X|3
-----
|O|6
-----
X|8|O
Enter a position: 3
3|X|3
-----
X|O|6
-----
X|8|O
3|X|3
-----
X|O|6
-----
X|O|O
Enter a position: 2
3|X|X
-----
X|O|6
-----
X|O|O
O|X|X
-----
X|O|6
-----
X|O|O
Enter a position: 4
DRAW
--------------------------------
Process exited after 60.05 seconds with return value 0
Press any key to continue . . .

0. Computer plays first 1. User plays first Enter choice: 16 e. Computer plays first 1. User plays first Enter choice: 1 312x1ol6 x1810 3 X 3 x1ol6 xlolo Enter a position: 2 x1ol6 xlolo x1ol6 xlolo Enter a position: 4 DRAW Process exited after 60.05

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