Написать код для игры НИМ. проверьте пожалуйста тот ли это код

#include <string>
     
    using namespace std;
 
    int compChoose(int markers);
    int userChoose(int markers);
     
     
    int random()
    {
        int random;
        random=(rand()%(3-1+1)+1);
        return 0;
    }
     
    int main ()
    {
         
          
        //Game of nim.
            cout << "\t\t*****************************************\n\n";
        cout << "\t\t\tN I M ! ! ! !\n";              //Title   
        cout << "\t\t*****************************************\n\n";
         
     
     
     bool winner = false;  //Variable indicates when we have a winner
      int computeChoose; //Variable represents the computer's choice
      int stones = 30;  //Varriable represents the number of markers left
      //Welcome player to game
      cout << "Welcome to the game of Nim.  There are 30 stones."<< endl;;
     
      while (!winner)
      {
     
        cout <<"Enter how many you would like to take away: "<< endl;
        //User makes a choice       stones -= userChoose(stones);
        cout <<"The number of stones left is " << stones << "." << endl;
        if (stones == 1)
        {
          winner = true;
          cout << "You win!" << endl;
        }
        else
        {
          //Computer's turn
          computeChoose = compChoose(stones);
          stones -= computeChoose;
          cout << "Computer chooses " << computeChoose << endl;
          cout << "The number of stones left is " << stones << "." << endl;
          if (stones == 1)
          {
    winner = true;
            cout << "Computer wins" << endl;
          }
        }
      }
    }    
     
     
    int compChoose(int stones)
      //Returns a random number between 1 and 3 representing the computer's choice
    {
      int choice; //Represents computer's choice
      do {
        choice = (random() % 3) + 1;
      } while (stones - choice < 1);
      return choice;
    }   
    int userChoose(int stones)
    {
  //Interacts with the user, allowing a choice for the game of Nim
      int choice;
      cin >> choice;
      //Loop until a proper choice is made
      while (choice <1 || choice > 3 || stones - choice <= 0)
      {
        if (choice < 1 || choice > 3) //Can only choose between 1 and 3
        {
          cout << "Your choice must be between 1 and 3" << endl;          cout << "Enter another choice: " << endl;
          cin >> choice;
        }
        else if (stones - choice <= 0) //User has taken too many markers
      {
        cout << "You must leave at least one stone" << endl;
            cout << "Enter another choice: " << endl;
            cin >>  choice;
          }
      }
     
     
         
         
        return 0;
    }