c++ creatures, dynamic object creation

/*  Basic Image Processing

 AUTHOR: Frank Valcarcel
 FSU ID: fav12
 RECITATION SECTION NUMBER: 14
 TA NAME: James McClain
 COURSE INFORMATION: COP 3330; T,R 3:35 - 4:50PM
 Project Number: 4
 Due Date: October 31, 2012

 SUMMARY



 INPUT


 BAD DATA CHECKING:
 When a file is streamed in, the file type is verified to insure the user has
 selected a PPM file, and that it is of type P3. At that time, the integers
 within the file header are validated larger than 0 and the stream operator
 also determines if enough "pixel" elements are available for the files width
 and height. On output, we truncate any pixel values to be between o and the
 specific image's depth value.

 OUTPUT
 The program will echoprint all input. The ostream << operator is overloaded
 to output the PPM file data to both the console and an output file.

 SAMPLE OUPUT



 DATA STRUCTURES


 ASSUMPTIONS


*/

#include <iostream>
#include <iomanip>
#include <algorithm>        // for forcing input to lowercase
#include <vector>           // for creating/storing dynamic sub-class objects
#include <fstream>          // for file read
#include <unistd.h>         // for using system commands and invoking delays

#include "balrog.h"
#include "cyberdemon.h"
#include "elf.h"
#include "human.h"

#include "functions.h"

using namespace std;

typedef Creature* CreaturePtr;
void loadPlayers (ifstream& is, vector<CreaturePtr>& GoodGuys,
                  vector<CreaturePtr>& BadGuys);
void battle (vector<CreaturePtr>& attacks, vector<CreaturePtr>& defends);



// main delegator
int main ()
{
    string playerName, fileName, move;
    ifstream fileIn;

    vector<CreaturePtr> GoodGuys;
    vector<CreaturePtr> BadGuys;

    title();

    cout << setw(37) << "Enter your name: ";
    cin >> playerName;
    cout << endl;
    cout << setw(23) << playerName << ", prepare for battle!\n" << endl;

    /*

    chooseCharacter();

    sleep(5);
    system("clear");

    */

    cout << "Enter a filename, " << playerName << " the "
         << characterType(playersCharacter) << "... (include .txt)" << endl;

    cout << "Filename: ";
    cin >> fileName;

    while (!validateFileExtension(fileName)) {

        cout << "File type is invalid. TXT files only." << endl;
        cout << "Enter a filename to open (include .txt), or be slain! : ";
        cin >> fileName;

        fileIn.open( fileName.c_str() );
    }

    if (fileIn.fail() ) {
        cout << "Failed to open input file." << endl;
        cout << "Enter a filename to open (include .txt), or be slain! : ";
        cin >> fileName;

        fileIn.open( fileName.c_str() );
    }

    cout << "file opened" << endl; // DELETE ME!!!

    loadPlayers (fileIn, GoodGuys, BadGuys);

    cin >> move;

    fileIn.close();

    return (0);
}



void loadPlayers (ifstream& is, vector<CreaturePtr>& GoodGuys,
                  vector<CreaturePtr>& BadGuys) {

    int species, strength, hitpoints;
    int count = 0;
    string line;

    if( is.good() ){

        for (int i = 0; i < 4; i++) {

            cout << "in good guy while loop... I should read data!" << endl; // DELETE ME!!!

            is >> species >> strength >> hitpoints;
            cout << species << strength << hitpoints;

            // if human type
            if(species == 0)
            {
                cout << "did I make it here? ";
                GoodGuys.push_back(new Human(strength, hitpoints));
                count ++;
                cout << "Good Human " << i << endl;
            }
            // if cyberdemon type
            else if(species == 1)
            {
                GoodGuys.push_back(new CyberDemon(strength, hitpoints));
                count ++;
                cout << "Good CyberDemon " << i << endl;
            }
            // if balrog type
            else if(species == 2)
            {
                GoodGuys.push_back(new Balrog(strength, hitpoints));
                count ++;
                cout << "Good Balrog " << i << endl;
            }
            // if elf type
            else if(species == 3)
            {
                GoodGuys.push_back(new Elf(strength, hitpoints));
                count ++;
                cout << "Good Elf " << i << endl;
            }
            // if data is invalid
            else {
                cout << is << " ";
                cout << "Error in file. Invalid creature. " << endl;
                return;
            }// end else
        }

        if (count >= 4) {

            for (int i = 0; i < 4; i++) {

                cout << "in bad guy loop... I should read data!" << endl; // DELETE ME!!!

                is >> species >> strength >> hitpoints;

                if (species > 0) {
                    cout << "bad species greater than zero" << endl;
                }

                else {
                    cout << "Error in file. Invalid creature. " << endl;
                    return;
                }// end else
            }
        }
    }
}