a crappy program

/* Program name:            evans_final.cpp - Final Project for CIS5 13SPR
 * Program description:     Multiple problem definitions. See comments below.
                            NOTE TO INSTRUCTOR: Array size is stored as the first integer
                            in files generated by this program, in case you are using
                            your own files.
 * Programmer:              Bradley Evans
 * Date:                    April 22nd, 2013
 */


#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;

void displayMenu(char& choice); // Display menu to user. Collect his menu choice.
void createArray(int*& arr, int& arraySize); // Generate a random array of user-specified size.
void saveArrayToFile(int arr[], int& arraySize); // Save the array to a user-specified file name
void displayArray(int*& arr, int& arraySize); // Display the current array in memory, if an array-generating function has been run.
void loadArrayFromFile(int*& arr, int& arraySize); // Load a previously saved array.
void sortArray(int*& arr, int& arraySize); // Sort an array in descending order.
void awesome(); // a special surprise

int main()
{
 // Problem 01: Declare and Initialize Arrays / Variables
    int     * arr = 0;              // Dynamic, pointer-based array.
    int     arraySize = 0;          // Size of the array in memory.
    char    choice;                 // Defined by user menu selection.
    bool    exitCondition = false;  // User exit condition
    bool    arrayInMemory = false;  // validates that one of the array-generating functions has been run.

// Introduction.
    cout    << "Final Cumulative Project for Bradley Evans [2465773]" << endl
            << "Developed for Riverside City College" << endl
            << "for fulfillment of requirements in CIS-5 (Programming Logic in C++)" << endl
            << "Instructor: Prof. Cristian Racataian" << endl
            << "Compiled June 2nd, 2013." << endl << endl
            << "NOTE TO USERS USING THEIR OWN FILES:" << endl
            << "This program stores array size as the first integer" << endl
            << "of new files." << endl << endl;

    do {
        displayMenu( choice );
        switch( choice )
        {
            case '1':
                cout << endl;
                createArray(arr, arraySize);
                arrayInMemory = true;
                cout << endl;
                break;
            case '2':
                cout << endl;
                loadArrayFromFile(arr, arraySize);
                arrayInMemory = true;
                cout << endl;
                break;
            case '3':
                cout << endl;
                if (arrayInMemory)
                {
                    sortArray(arr, arraySize);
                } else {
                    cout << "No array in memory." << endl;
                }
                cout << endl;
                break;
            case '4':
                cout << endl;
                if (arrayInMemory)
                {
                    displayArray(arr, arraySize);
                } else {
                    cout << "No array in memory." << endl;
                }
                cout << endl;
                break;
            case '5':
                cout << endl;
                exitCondition = true;
                awesome();
                cout << "Thank you for using this program." << endl;
                system("PAUSE");
        }
    } while(!exitCondition);

    exit(0);
}

void displayMenu ( char& choice ) // Display menu. 10 points.
{
    bool menuInputValid = false;

    do {
        cout    << "Please select from the following options." << endl
                << "[1] - Create an array of random elements, save to a file." << endl
                << "[2] - Load a previous array from file." << endl
                << "[3] - Sort the array." << endl
                << "[4] - Display the array." << endl
                << "[5] - Exit the program and give Brad Evans an 'A'." << endl
                << "Selection: ";
        cin     >> choice;
        if ( choice == '1' ) // input validation
        {
            menuInputValid = true;
        } else if (choice == '2' ) {
            menuInputValid = true;
        } else if (choice == '3' ) {
            menuInputValid = true;
        } else if (choice == '4' ) {
            menuInputValid = true;
        } else if (choice == '5' ) {
            menuInputValid = true;
        } else {
            cout << endl << "Input invalid. Please try again." << endl;
            menuInputValid = false;
        }
    } while ( !menuInputValid );

}

void createArray(int*& arr, int& arraySize) // Populate the array. 30 points.
{
    int i;         // iterator
    int seed;      // random seed specified by user

    cout << "Specify the size of the array." << endl;
    cin  >> arraySize;
    cout << endl << "Please enter a random seed. A seed is any positive integer." << endl;
    cin  >> seed;
    cout << endl;
    arr = new int[arraySize];
    srand(seed);   // send the seed to the rand() function

    // Populate the array.
    for ( i = 0; i < arraySize; i++ )
    {
        arr[i] = ( rand()%20 + 1 ) *5;
    }
    saveArrayToFile(arr, arraySize);
}

void saveArrayToFile (int arr[], int& arraySize) // Save the array to a file.
{
    string filename; // User defined filename.
    ofstream out;
    int i;

    cout << "Please enter a filename to save the array: ";
    cin  >> filename;

    out.open(filename);
    out << arraySize << endl; // Make the first line of the file the arraySize for later reference.
    for (i = 0; i < arraySize; i++)
    {
        out << arr[i] << endl;
    }
    cout << endl << "The file has been saved as " << filename << "." << endl
         << "The array saved is: " << endl;
         for ( i = 0; i < arraySize; i++ )
         {
            cout << "[" << arr[i] << "] ";
         }
    cout << endl;
    out.close();
}

void displayArray(int*& arr, int& arraySize) // Display the array on a single line.
{
    int i = 0;

    cout << arr[0];
    for (i = 1; i < arraySize; i++)
    {
        cout << " | " << arr[i];
    }
    cout << endl;
}

void loadArrayFromFile(int*& arr, int& arraySize)
{
    int i = 0;
    int infileNum;
    string filename;
    ifstream myArray;

    arraySize = 0;

    cout << "Please enter the file name of the array you wish to view: " << endl;
    cin  >> filename;
    // Open the user specified file, display contents.
    myArray.open( filename );
    myArray >> arraySize;
    arr = new int [arraySize];
    while ( !myArray.eof() )
    {
        myArray >> infileNum;
        arr[i++] = infileNum;
    }
    myArray.close();
}

void sortArray(int*& arr, int& arraySize) // Sort the array in descending order
{
    int     i,
            j,
            max,    // placeholder for largest value remaining
            temp;   // for swapping
    char    saveChoice; // user decision to save
    // show you the current array
    cout << "Old Array: " << endl;
    displayArray(arr, arraySize);
    // sort this sucker
    for ( j = 0; j < arraySize; j++ )
    {
        for ( i = j+1; i < arraySize; i++ )
        {
            if (arr[i] > arr[j])
            {
                max = arr[i];
                temp = arr[j];
                arr[j] = max;
                arr[i] = temp;
            }
        }
    }
    // show you the new array
    cout << "Sorted Array: " << endl;
    displayArray(arr, arraySize);
    cout << endl;
    // save the new array, in case you want to. Wasn't in the problem
    // definition, but here you go anyway.
    cout << "Would you like to save the new array? [y/n]";
    cin >> saveChoice;
    if (saveChoice == 'y' || saveChoice == 'Y')
    {
        saveArrayToFile(arr, arraySize);
    }
}

void awesome() // enjoy this masterpiece of artwork
{

cout    << "MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM" << endl
        << "MMMMMMMMMMMM===============MMMMMMMMMMMMM" << endl
        << "MMMMMMM=========================MMMMMMMM" << endl
        << "MMMM==MMMM=============7MMMM=======MMMMM" << endl
        << "MMM=MM   MMM=========MM    MMM======MMMM" << endl
        << "MMM=M    MMMM=======M     MMMMM=====MMMM" << endl
        << "MM=M      M M=======M       M M======MMM" << endl
        << "M==M        M=======M         M=======MM" << endl
        << "M=====================================MM" << endl
        << "M=====================================MM" << endl
        << "M===MMMMMMMMMMMMMMMMMMMMMMMMMMM=======MM" << endl
        << "MM====MOOOOOOOOOOOOOOOOOOOOOOOM======MMM" << endl
        << "MMM====MMOOOOOOOOOOOOOOOOOOOOOM=====MMMM" << endl
        << "MMMM====MMOOOOOOOO:::::::OOOOM=====MMMMM" << endl
        << "MMMMMM===MMOOOOO:::::::::::MM====MMMMMMM" << endl
        << "MMMMMMM====MMOO::::::::::MM=====MMMMMMMM" << endl
        << "MMMMMMMMM=====MMM::::MMM======MMMMMMMMMM" << endl
        << "MMMMMMMMMMMM===============MMMMMMMMMMMMM" << endl
        << "MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM" << endl
        << endl;
}