why int this code running? Id appreciate a comment on the location of the error.

#include

using namespace std;$$

class TicTacToe

$\{$

public:$$

$$ TicTacToe$()$

$\{$

$$ for$($int i $=0$; i $<3$; $++$i$)$

$\{$

$$ for$($int j $=0$; j $<3$; $++$j$)$

$\{$

$$ board$[$i$][$j$]=0$;$$

$\}$

$\}$

$$

$$ sigil$[0]=\text{'}.\text{'}$;

$$ sigil$[1]=\text{'}$X$\text{'}$;

$$ sigil$[2]=\text{'}$O$\text{'}$;

$\}$

$$

$$ void play$()$;

private:$$

$$ char sigil$[3]$;$$

$$ int board$[3][3]$;

$$ void drawBoard$()$;

$$ bool isMoveLegal$($int row, int column$)$;

$$ int winner$()$;

$$ bool isGameOver$()$;

$\}$;$$

void TicTacToe::drawBoard$()$

$\{$

$$ cout $<<"012"<<$ endl;

$$ for$($int i $=0$; i $<3$; $++$i$)$

$\{$

$$ cout $<<$ i $<<""$;

$$ for$($int j $=0$; j $<3$; $++$j$)$

$\{$

$$ cout $<<$ sigil$[$board$[$i$][$j$]]<<""$;

$\}$

$$ cout $<<$ endl;$$

$\}$

$\}$

bool TicTacToe::isMoveLegal$($int row, int column$)$

$\{$

$$ return row $>=0$ && row $<3$ && column $>=0$ && column $<3$ && board$[$row$][$column$]==0$;$$

$\}$

int TicTacToe::winner$()$

$\{$

$//$check rows and columns$$

$$ for$($int i $=0$; i $<3$; $++$i$)$

$\{$

$$ if$($board$[$i$][0]==$ board$[$i$][1]$ && board$[$i$][1]==$ board$[$i$][2]$ && board$[$i$][0]!=0)$

$\{$

$$ return board$[$i$][0]$; $$

$\}$

$$ if$($board$[0][$i$]==$ board$[1][$i$]$ && board$[1][$i$]==$ board$[2][$i$]$ && board$[0][$i$]!=0)$

$\{$

$$ return board$[0][$i$]$;

$\}$

$\}$

$$ return $0$;$$

$//$check diagonals

$$ if$($board$[0][0]==$ board$[1][1]$ && board$[1][1]==$ board$[2][2]$ && board$[0][0]!=0)$

$\{$

$$ return board$[0][0]$;

$\}$

$$ if$($board$[0][2]==$ board$[1][1]$ && board$[1][1]==$ board$[2][0]$ && board$[0][2]!=0)$

$\{$

$$ return board$[0][2]$;

$\}$

return $0$;$$

$\}$

bool TicTacToe::isGameOver$()$

$\{$

$$ if$($winner$()!=0)$

$\{$

$$ return true;$$

$\}$

$$ for$($int i $=0$; i $<3$; $++$i$)$

$\{$

$$ for$($int j $=0$; j $<3$; $++$j$)$

$\{$

$$ if$($board$[$i$][$j$]==0)$

$\{$

$$ return false;

$\}$

$\}$

$`\}$

$$ return true;$$

$\}$

void TicTacToe::play$()$

$\{$

$$ int currentPlayer $=1$;$$

$$ while$(!$isGameOver$())$

$\{$

$$ drawBoard$()$;$$

$$ cout $<<$ "player $"<<$ currentPlayer $<<"("<<$ sigil$[$currentPlayer$]<<"),$ enter your move $($row and column$)$: $"$;

$$ int row $=-1,$ column $=-1$;

$$ cin $>>$ row $>>$ column;$$

$$

$$ while$(!$isMoveLegal$($row$,$ column$))$

$\{$

$$ cout $<<$ "Invalid move. Try again: $"$;

$$ cin $>>$ row $>>$ column;$$

$\}$

$$ board$[$row$][$column$]=$ currentPlayer;$$

$$ currentPlayer