The code shown below is for a tic tac toe game where one user plays against anot
ID: 3737879 • Letter: T
Question
The code shown below is for a tic tac toe game where one user plays against another on a 3x3 board. How would I modify the code so that if I wanted to increase the board size from 3by3 to a bigger size (E.G 6by6) the condition for winning would be 5 in a row of either player X or player O, horizontally, vertically or diagonally? Please edit the bold part of the code where I brute forced the winning condition instead of varying it according to board size. Please replace with correct code. As soon as 5 in a row is achieved either horizontally, vertically or diagonally the game should end.
#include <iostream>
#include <fstream>
#include <cstdlib>
#include<string>
using namespace std;
class ticTacToe
{
public:
ticTacToe(int);
void setBoard();
void printBoard();
// bool checkEveryRow();
//bool checkEveryColumn();
// bool checkDiagonal1();
// bool checkDiagonal2();
bool determineWinner();
void moves();
bool validateMove();
void play();
private:
char **board;
int counter;
int row;
int column;
char ch;
string algorithm;
int boardSize;
};
//constructor
ticTacToe::ticTacToe(int boardSize)
{
// create board of size nxn
this->board = (char **)malloc(boardSize * sizeof(char *));
int i;
for( i = 0 ; i < boardSize ; i++ )
this->board[i] = (char *)malloc(boardSize * sizeof(char));
this->boardSize = boardSize;
setBoard();
}
void ticTacToe::setBoard()
{
counter=0;
for (int i=0; i<boardSize;i++)
{
for (int j=0; j<boardSize;j++)
{
board[i][j] = 0;
}
}
}
void ticTacToe::printBoard()
{
for (int i=0; i<boardSize;i++)
{
for (int j=0; j<boardSize; j++)
{
cout << board[i][j];
}
cout << endl;
}
}
void ticTacToe::moves()
{
cout << "Player " << counter%2+1 << endl;
cout << "Enter row:" << endl;
cin >> row;
cout << "Enter column:" << endl;
cin >> column;
}
bool ticTacToe::validateMove()
{
if ((row<1||row>boardSize)||(column<1||column>boardSize)||(board[row-1][column-1]!=0))
{
cout << "Invalid entry" << endl;
return false;
}
else
{
return true;
}
}
/*
bool ticTacToe::checkEveryRow()
{
for (int i=0;i<boardSize;i++)
{
for (int j=0; j<boardSize;j++)
{
int n = 0;
if (board[i][j]==ch)
{
n++;
}
else
{
break;
}
}
}
if (n==boardSize)
{
return true;
}
return false;
}
bool ticTacToe::checkEveryColumn()
{
for (int i=0;i<boardSize;i++)
{
for (int j=0; j<boardSize;j++)
{
if (board[j][i]==ch)
{
return true;
}
else
{
return false;
}
}
}
}
bool ticTacToe::checkDiagonal1()
{
for (int i=0;i<boardSize;i++)
{
if (board[i][j]==ch)
{
return true;
}
else
{
return false;
}
}
}
bool ticTacToe::checkDiagonal2()
{
for (int i=0;i<boardSize;i++)
{
int j = boardSize-1;
if (board[i][j]==ch)
{
return true;
}
else
{
return false;
}
j--;
}
}
*/
bool ticTacToe::determineWinner()
{
if (counter%2==0)
{
ch = 'X';
}
else
{
ch = 'O';
}
if (validateMove())
{
board[row-1][column-1] = ch;
if (counter%2==0)
{
algorithm = "alg1";
}
else
{
algorithm = "alg2";
}
cout << "r" << row << "c" << column << " " << algorithm << endl;
counter ++;
}
if (((board[0][0]==ch)&&(board[0][1]==ch)&&(board[0][2]==ch))|| //check every row
((board[1][0]==ch)&&(board[1][1]==ch)&&(board[1][2]==ch))||
((board[2][0]==ch)&&(board[2][1]==ch)&&(board[2][2]==ch))||
((board[0][0]==ch)&&(board[1][0]==ch)&&(board[2][0]==ch))|| //check every column
((board[0][1]==ch)&&(board[1][1]==ch)&&(board[2][1]==ch))||
((board[0][2]==ch)&&(board[1][2]==ch)&&(board[2][2]==ch))||
((board[0][0]==ch)&&(board[1][1]==ch)&&(board[2][2]==ch))|| //check diagonal one
((board[0][2]==ch)&&(board[1][1]==ch)&&(board[2][0]==ch))) //check diagonal two
{
return true;
}
else if (counter==boardSize*boardSize)
{
cout << "Draw."<< endl;
printBoard();
setBoard();
}
return false;
}
void ticTacToe::play()
{
setBoard();
do
{
moves();
if (determineWinner())
{
if (counter%2==0)
{
cout << "win=alg2" << endl;
cout << endl;
printBoard();
}
else
{
cout << "win=alg1" << endl;
cout << endl;
printBoard();
}
break;
}
else
{
printBoard();
}
}
while (true);
}
int main()
{
int boardSize = 0;
ifstream inData;
inData.open("input.txt");
inData >> boardSize;
cout << "size=" << boardSize << endl;
ticTacToe t(boardSize);
cout << "Tic Tac Toe:" << endl;
cout << endl;
t.play();
return 0;
}
Explanation / Answer
#include <iostream>
#include <fstream>
#include <iomanip>
#include <cstdlib>
#include <string>
using namespace std;
class ticTacToe
{
public:
ticTacToe(int);
void setBoard();
void printBoard();
// bool checkEveryRow();
//bool checkEveryColumn();
// bool checkDiagonal1();
// bool checkDiagonal2();
bool determineWinner();
void moves();
bool validateMove();
void play();
private:
char **board;
int counter;
int row;
int column;
char ch;
string algorithm;
int boardSize;
};
//constructor
ticTacToe::ticTacToe(int boardSize)
{
// create board of size nxn
this->board = (char **)malloc(boardSize * sizeof(char *));
int i;
for (i = 0; i < boardSize; i++)
this->board[i] = (char *)malloc(boardSize * sizeof(char));
this->boardSize = boardSize;
setBoard();
}
void ticTacToe::setBoard()
{
counter = 0;
for (int i = 0; i < boardSize; i++)
{
for (int j = 0; j < boardSize; j++)
{
board[i][j] = 0;
}
}
}
void ticTacToe::printBoard()
{
for (int i = 0; i < boardSize; i++)
{
for (int j = 0; j < boardSize; j++)
{
cout << setw(3) << board[i][j];
}
cout << endl;
}
}
void ticTacToe::moves()
{
cout << "Player " << counter % 2 + 1 << endl;
cout << "Enter row:" << endl;
cin >> row;
cout << "Enter column:" << endl;
cin >> column;
}
bool ticTacToe::validateMove()
{
if ((row < 1 || row > boardSize) || (column < 1 || column > boardSize) || (board[row - 1][column - 1] != 0))
{
cout << "Invalid entry" << endl;
return false;
}
else
{
return true;
}
}
/*
bool ticTacToe::checkEveryRow()
{
for (int i=0;i<boardSize;i++)
{
for (int j=0; j<boardSize;j++)
{
int n = 0;
if (board[i][j]==ch)
{
n++;
}
else
{
break;
}
}
}
if (n==boardSize)
{
return true;
}
return false;
}
bool ticTacToe::checkEveryColumn()
{
for (int i=0;i<boardSize;i++)
{
for (int j=0; j<boardSize;j++)
{
if (board[j][i]==ch)
{
return true;
}
else
{
return false;
}
}
}
}
bool ticTacToe::checkDiagonal1()
{
for (int i=0;i<boardSize;i++)
{
if (board[i][j]==ch)
{
return true;
}
else
{
return false;
}
}
}
bool ticTacToe::checkDiagonal2()
{
for (int i=0;i<boardSize;i++)
{
int j = boardSize-1;
if (board[i][j]==ch)
{
return true;
}
else
{
return false;
}
j--;
}
}
*/
bool ticTacToe::determineWinner()
{
if (counter % 2 == 0)
{
ch = 'X';
}
else
{
ch = 'O';
}
if (validateMove())
{
board[row - 1][column - 1] = ch;
if (counter % 2 == 0)
{
algorithm = "alg1";
}
else
{
algorithm = "alg2";
}
cout << "r" << row << "c" << column << " " << algorithm << endl;
counter++;
}
int i, j, c;
for (i = 0; i < boardSize; i++)
{
c = 0;
for (j = 0; j < boardSize; j++)
{
//check every row
if (board[i][j] == ch)
c++;
}
if (c == boardSize)
return true;
}
for (i = 0; i < boardSize; i++)
{
c = 0;
for (j = 0; j < boardSize; j++)
{
//check every column
if (board[j][i] == ch)
c++;
}
if (c == boardSize)
return true;
}
c = 0;
for (i = 0; i < boardSize; i++)
{
for (j = 0; j < boardSize; j++)
{
// check diagnonal 1
if (i == j && board[i][j] == ch)
c++;
}
}
if (c == boardSize)
return true;
c = 0;
for (i = 0; i < boardSize; i++)
{
for (j = 0; j < boardSize; j++)
{
// check diagnonal 2
if (i + j == boardSize - 1 && board[i][j] == ch)
c++;
}
}
if (c == boardSize)
return true;
if (counter == boardSize * boardSize)
{
cout << "Draw." << endl;
printBoard();
setBoard();
}
return false;
}
void ticTacToe::play()
{
setBoard();
do
{
moves();
if (determineWinner())
{
if (counter % 2 == 0)
{
cout << "win=alg2" << endl;
cout << endl;
printBoard();
}
else
{
cout << "win=alg1" << endl;
cout << endl;
printBoard();
}
break;
}
else
{
printBoard();
}
} while (true);
}
int main()
{
int boardSize = 0;
ifstream inData;
inData.open("input.txt");
inData >> boardSize;
cout << "size=" << boardSize << endl;
ticTacToe t(boardSize);
cout << "Tic Tac Toe:" << endl;
cout << endl;
t.play();
return 0;
}