Why isnt this code running?

I belive itd have to due with the "saveResultsToFile" at the end of the play game. Ive been trying to make multiple, CardGame.h$,$ CardGame.cpp$,$ main.cpp and a README.txt which isnt already included since im not able to make mutiples files and get the code running. if you could explain the process of which ive shown im trying to get to id need id appreciate it$.$

#include

#include

#include

#include

#include

#include

#include

class CardGame

$\{$

private:

$$ std::vector deck;$$

$$ int userScore;$$

$$ int dealerScore;$$

public:

$$ CardGame$()$;$$

$$ void shuffleDeck$()$;$$

$$ int drawCard$()$;

$$ void playGame$()$;$$

$$ void saveResultsToFile$($const std::string &filename$)$;

$\}$;

$//$Constructor to initialize the game

CardGame::CardGame$()$ : userScore$(0),$ dealerScore$(0)$

$\{$

$//$Initialize the deck with values from $1$ to $10($representing card values$)$

$$ for$($int i $=1$; i $<=10$; i$++)$

$\{$

$$ deck.push$\_$back$($i$)$;

$$ deck.push$\_$back$($i$)$;

$\}$

$\}$

$//$Shuffle the deck using a random generator

void CardGame::shuffleDeck$()$

$\{$

$$ std::random$\_$device rd;$$

$$ std::mt$19937$ g$($rd$())$;

$$ std::shuffle$($deck$.$begin$(),$ deck.end$(),$ g$)$;

$\}$

$//$Function to draw a card from the deck

int CardGame::drawCard$()$

$\{$

$$ if$($deck$.$empty$())$

$\{$

$$ std::cout $<<$ "The deck is empty!" $<<$ std::endl;$$

$$ return $0$;$$

$\}$

$$ int card $=$ deck.back$()$;

$$ deck.pop$\_$back$()$;

$$ return card;$$

$\}$

$//$Main game logic

void CardGame::playGame$()$

$\{$

$$ shuffleDeck$()$;

$//$user$\text{'}$s turn

$$ std::cout $<<$ "Your turn!" $<<$ std::endl;$$

$$ char choice;$$

$$ while$($userScore $<21)$

$\{$

$$ int card $=$ drawCard$()$;$$

$$ userScore $+=$ card;$$

$$ std::cout $<<$ "You drew a card with value: $"<<$ card $<<$ std::endl;$$

$$ std::cout $<<$ "Your current score: $"<<$ userScore $<<$ std::endl;$$

$$ if$($userScore $>21)$

$\{$

$$ std::cout $<<$ "exceeded $21!$ You lose!" $<<$ std::endl;$$

$$ return;$$

$\}$

$$ std::cout $<<"$Do you want to draw another card? $($y$/$n$)$: $"$;

$$ std::cin $>>$ choice;$$

$$ if$($choice $!=\text{'}$y$\text{'})$

$\{$

$$ break;

$\}$

$\}$

$//$Dealer$\text{'}$s turn

$$ std::cout $<<$ "Dealer's turn!" $<<$ std::endl;$$

$$ while$($dealerScore $<17)$

$\{$

$$ int card $=$ drawCard$()$;$$

$$ dealerScore $+=$ card;

$$ std::cout $<<$ "Dealer drew a card with value: $"<<$ card $<<$ std::endl;$$

$$ std::cout $<<$ "Dealer's current score: $"<<$ dealerScore $<<$ std:: endl;$$

$$ if$($dealerScore $>21)$

$\{$

$$ std::cout $<<$ "dealer exceed $21!$ you win!" $<<$ std::endl;$$

$$ return;$$

$\}$

$\}$

$//$Determine winner

$$ if$($userScore $>$ dealerScore$)$

$\{$

$$ std::cout $<<$ "Congradulation! You win!" $<<$ std::endl;$$

$\}$

$$ else if$($userScore $==$ dealerScore$)$

$\{$

$$ std::cout $<<$ "It's a tie!" $<<$ std::endl;$$

$\}$

$$ else

$\{$

$$ std::cout $<<$ "Dealer wins! Better luck next time." $<<$ std::endl;$$

$\}$

$//$Save game results to a file$$

void CardGame::saveResultsToFile$($const std::string &filename$)$

$\{$

$$ std::ofstream file$($filename$)$;

$$ if$($file$.$is$\_$open$())$

$\{$

$$ file $<<$ "Game results:

$"$;

$$ file $<<$ "User Score: $"<<$ userScore $<<"$

$"$;

$$ file $<<$ "Dealer Score: $"<<$ dealerScore $<<"$

$"$;

$$ file.close$()$;

$$ std::cout $<<$ "Results saved to $"<<$ filename $<<$ std::endl;$$

$\}$

$$ else

$\{$

$$ std::cout $<<$ "Failed to open file!" $<<$ std::endl;$$

$\}$

$\}$

$\}$

int main$()$

$\{$

$$ CardGame game; $//$Create an instance of the game

$$ game.playGame$()$; $//$Play game$$

$$ game.saveResultsToFile$("$game$\_$results.txt$")$; $//$save results to a file$$

$$ return $0$;$$

$\}$