Programming Challenge 5.24 - Using Files - Numeric Processing

Example File: Random.txt

/* Using Files - Numeric Processing - The file "Random.txt" contains a
   long list of random numbers. This program opens the file, reads all
   the numbers from the file, and calculates the following:
  
   * The number of numbers in the file
   * The sum of all the numbers in the file
   * The average of all the numbers in the file

   The program displays:
  
   * The number of numbers found in the file
   * The sum of the numbers
   * The average of the numbers */

#include "Utility.h"

int main()
{
    /* Declare: File stream variable */
    ifstream randomNumbers;

    /* Variables: Count numbers (counter variable) */
    int countNumbers = 1;

    /* Variables: Numbers, Number of numbers, Sum of numbers, Average of
       numbers */
    double numbers = 0,
           numberOfNumbers = 0,
           sumOfNumbers = 0,
           averageOfNumbers = 0;

    /* Open: File "Random.txt" */
    randomNumbers.open("Random.txt");

    /* If statement::Error handling: If the file was opened successfully,
       it will be processed */
    if (randomNumbers)
    {
            /* For loop: As long as numbers are read in from "Random.txt",
               count numbers is incremented, counting the numbers */
            for (countNumbers; randomNumbers >> numbers; countNumbers++)
            {
                /* Number of numbers gets count numbers */
                numberOfNumbers = countNumbers;

                /* Calculations: Sum of numbers, Average number of numbers
                   (The average number is calculated by dividing the sum
                   of numbers = 105527 by the number of numbers = 200 */
                sumOfNumbers += numbers;
                averageOfNumbers = (sumOfNumbers / numberOfNumbers);
            }

        /* Display: Formatted Output of the total number of
           numbers, the sum of numbers, the average number of numbers */
        cout << "\t\tRandom File Processor\n\n"
             << "This program calculates and displays the following\n"
             << "items contained in the file 'Random.txt' for you:\n\n"
             << "* The number of numbers\n"
             << "* The sum of numbers\n"
             << "* The average number of numbers\n\n";

        cout << "The total number of numbers is: "
             << setw(8) << right << numberOfNumbers << endl;
        cout << "The sum total of all numbers is: "
             << setw(7) << right << sumOfNumbers << endl;
        cout << "The average number of numbers is: "
             << setw(10) << right << averageOfNumbers << endl;
    }

    else
    {
        /* Display: Error message */
        cout << "Error: The file 'Random.txt' could not be processed. This\n"
            << "error could be caused by one of the following reasons:\n\n"
            << "* Moving the file from the programs source folder\n"
            << "* A damaged source file\n"
            << "* An overwritten source file\n"
            << "* By accidentally renaming 'Random.txt'\n\n"
            << "To solve this problem, please close this program, check that\n"
            << "the file exists, that it is not damaged, is named 'Random.txt'\n"
            << "and that it is located in the source folder of your program.\n"
            << "Once you checked the above points, please run the program again!\n";
    }

    /* Close: File "Random.txt */
    randomNumbers.close();

    pauseSystem();
    return 0;
}