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Enumerated types and functions

RogerWang (8)
Using the code that i will post below i need to add in certain functions that I will list in a moment so what I'm asking is can someone give me assistance on how to do this. This is for an assignment that is due tomorrow and I am panicking right now.

Here are the functions:
1. DisplayMainMenu: Displays the Main Menu as described above. Performs error checking for possible choices. Returns menu choice as an enumerated type (see below).

2. LoadPlayerRecords : Loads player records from PlayerStats.txt at start up of program.
Input parameters: array of player records to load. Returns: the #of records loaded from the file.

3. WritePlayerRecords: Writes out the player statistics to the PlayerStats.txt file. Input
parameters: array of player records and the # of records to write.

4. DisplayPlayerRecords: Displays the player statistics to the screen in a table format. Input parameters: array of player records and the # of records to display.

5. EnterPlayerRecords: Requests the user to enter a call sign for each player, checks to see if the call sign already exists, if it does then it does nothing, otherwise it creates a new player record for each player. Checks to ensure that both players use different call signs. Input parameters: array of player records and # of records in list. Returns: the updated # of records in list, the index into the list for player 1 and the index into the list for player 2.

6. CheckForExistingCallSign: Checks to see if a call sign already exists in the player record list( if it does then it returns the index to the existing player record otherwise it returns -1).
Input parameters: array of player records, #of records in the list and the call sign. Returns:index of player record (or -1).

7. AssignSymbolsToPlayers: Requests the players to choose a symbol (“X” or “O”) and assigns the symbol to the appropriate player. Input parameters: array of player records, index into the list for player 1 and index into the list for player 2.
8. PlayTicTacToe: Plays the TicTacToe game. Input parameters: array of player records, index into the list for player 1, index into the list for player 2, and # of records in the player record list.

9. UpdatePlayerStats: Updates player 1 and player 2 stats (based on win/loss/tie) using function UpdatePlayerRecord for each player. Input parameters: array of player records, index into the list for player 1, index into the list for player 2, # of records in the player record list and game state (win/loss/tie).

10. UpdatePlayerRecord: Updates an individual player record (win/loss/tie). Input parameters: array of player records, index into the list for player and game state (did player win, lose or tie).

11. BONUS: selectionSort: Sorts the player record list by player’s individual points. Research details on the Selection Sort algorithm. Document in writing (using your own words) how this algorithm works.
RogerWang (8)
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#include <iostream>
#include <string>
#include "main.h"
#include <stdio.h>
#include <stdlib.h>

using namespace std;

int main(void)
{
  bool gameOver = false;		      // game loop control flag
  char posLocation;				        // user input variable for position choice
  char playAgain = 'A';			      // program exit control flag
  char playerSymbol = 'X';		    // current player symbol
  
  string pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9;
  string pos[9];				// board display variables

	pos[0] == pos1;
	pos[1] == pos2;
	pos[2] == pos3;
	pos[3] == pos4;
	pos[4] == pos5;
	pos[5] == pos6;
	pos[6] == pos7;
	pos[7] == pos8;
	pos[8] == pos9;

	

  DisplayIntro();                 // Display introduction screen
  while( playAgain == 'A' )
  {
    InitializeGame(gameOver, playerSymbol, pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9);   // Initializes the game board
    DisplayGameBoard(pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9);                         // Displays the game board

    while( !gameOver )			                                                                        //  Loop until a winner is determined or all squars have been used
    {
      posLocation = GetValidUserInput(playerSymbol, pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9);    // Get vaild user inpur
      SetGameBoardPosition(posLocation, playerSymbol, pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9);  // Set the appropriate board position
      DisplayGameBoard(pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9);                                 // Display the game board
      gameOver = CheckForGameOver(playerSymbol, pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9);        // Check for end of game condition and change the player symbol
    }
    playAgain = RequestAdditionalGame();   // Determine whether to play the game again
  }

  DisplayCredits();                         // Display the credit screen
  return 0;
}

char RequestAdditionalGame(void)
{
  char userEntry;

    cout << "Enter \"A\" to play again, any other key to exit: " << endl << endl;		// getting user input for whether the player wants to play again
    cin >> userEntry;
    userEntry = toupper(userEntry);
    cout << endl << endl;

    return(userEntry);
}

void UpdatePlayer(char& playerSymbol)
{
  if(playerSymbol == 'O')			// alternating between the X and O player
    playerSymbol = 'X';
  else
    playerSymbol = 'O';
}

bool CheckForGameOver(char& playerSymbol, string pos1, string pos2, string pos3, string pos4, string pos5, string pos6, string pos7, string pos8, string pos9)
{
    if( (pos1 == pos2 && pos1 == pos3) || (pos4 == pos5 && pos4 == pos6) || (pos7 == pos8 && pos7 == pos9) ||  // checking game victory conditions
        (pos1 == pos4 && pos1 == pos7) || (pos2 == pos5 && pos2 == pos8) || (pos3 == pos6 && pos3 == pos9) ||
        (pos1 == pos5 && pos1 == pos9) || (pos3 == pos5 && pos3 == pos7) )
    {
        cout << endl << "Player " << playerSymbol << " wins!!  Whoohooo!!" << endl << endl << endl;
  			return true;															
    }
    else if( pos1 != "1" && pos2 != "2" && pos3 != "3" && pos4 != "4" && pos5 != "5" && pos6 != "6" && pos7 != "7" && pos8 != "8" && pos9 != "9" )
    {
        cout << endl << "It's a draw!! Get'em next time." << endl << endl << endl;
  			return true;															
    }
    else
    {
      UpdatePlayer(playerSymbol);
      return false;
    }
}

void SetGameBoardPosition(int posLocation, char playerSymbol, string& pos1, string& pos2, string& pos3, string& pos4, string& pos5, string& pos6, string& pos7, string& pos8, string& pos9)
{
  if( posLocation == '1' )			// setting game variable based on the user input value
    pos1 = playerSymbol;
  else if( posLocation == '2')
    pos2 = playerSymbol;
  else if( posLocation == '3')
    pos3 = playerSymbol;
  else if( posLocation == '4')
    pos4 = playerSymbol;
  else if( posLocation == '5')
    pos5 = playerSymbol;
  else if( posLocation == '6')
    pos6 = playerSymbol;
  else if( posLocation == '7')
    pos7 = playerSymbol;
  else if( posLocation == '8')
    pos8 = playerSymbol;
  else if( posLocation == '9')
    pos9 = playerSymbol;
}

char GetValidUserInput(char playerSymbol, string pos1, string pos2, string pos3, string pos4, string pos5, string pos6, string pos7, string pos8, string pos9)
{
  bool validInput = false;
  char entry;

  while( !validInput)
  {
      cout << "Enter the location number where you want to place an \"" << playerSymbol << "\": ";  
      cin >> entry;		// getting user input for the board position
      if( entry >= '1' && entry <= '9')
      {

        if( (entry == '1' && pos1 == "1") || (entry == '2' && pos2 == "2") || (entry == '3' && pos3 == "3") ||
            (entry == '4' && pos4 == "4") || (entry == '5' && pos5 == "5") || (entry == '6' && pos6 == "6") ||
            (entry == '7' && pos7 == "7") || (entry == '8' && pos8 == "8") || (entry == '9' && pos9 == "9") )			
        {
          validInput = true;
        }
        else 
        {
          cout << "You have entered a position that has already been used. ";  
          validInput = false;
        }
      }
      else
      {
        cout << "You have entered an incorrect value.  Please enter a number from 1 to 9. ";  
      }
      cout << endl << endl;
  }
  return entry;
}

void InitializeGame(bool& gameOver, char& playerSymbol, string& pos1, string& pos2, string& pos3, string& pos4, string& pos5, string& pos6, string& pos7, string& pos8, string& pos9)
{
    gameOver = false;			// initializing game variables
    playerSymbol = 'O';
    pos1 = "1"; 
    pos2 = "2";
    pos3 = "3";
    pos4 = "4"; 
    pos5 = "5";
    pos6 = "6";
    pos7 = "7";
    pos8 = "8";
    pos9 = "9";
}

void DisplayIntro(void)
{
  cout << "**************************************************" << endl;
  cout << "                   Welcome to                    *" << endl;
  cout << "               Awesome Tic Tac Toe               *" << endl;
  cout << "                 Well, kind of...                *" << endl;
  cout << "**************************************************" << endl;
  cout << endl << endl;
  system("pause");
  cout << endl << endl;
}

void DisplayGameBoard(string pos1, string pos2, string pos3, string pos4, string pos5, string pos6, string pos7, string pos8, string pos9)
{    
  cout << " " << pos1 << " | " << pos2 << " | " << pos3 << endl;		// displaying the initial game board
  cout << "----------" << endl;
  cout << " " << pos4 << " | " << pos5 << " | " << pos6 << endl;
  cout << "----------" << endl;
  cout << " " << pos7 << " | " << pos8 << " | " << pos9 << endl;
  cout << endl;
}

void DisplayCredits(void)
{
  cout << endl << endl;
  cout << "*************  CREDITS  *************" << endl;			// displaying the game credits
  cout << "    Designer: Me                    *" << endl;
  cout << "    Programmer: Me                  *" << endl;
  cout << "    Art Production: Me              *" << endl;
  cout << "    Everything Else: All Me         *" << endl;
  cout << "*************************************" << endl;
  cout << endl << endl;
  system("pause");
}
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