ExtraCreditAssignment1

/* Eva Goins
 * Extra Credit Assignment #1
 * Description: An application that prints whole numbers
 *      less than 6 digits (0-99999) where the sum of
 *      the factorial of each digit is the number itself.
 *      For example, IF 123 = 1! + 2! + 3!, the program
 *      will print the number 123 (though this is not
 *      one of the four). There are 4 such numbers. A
 *      method uses an integer argument to convert it
 *      into a string, in order to get each individual
 *      character in order to calculate the factorial
 *      sum of the number. If the number itself matches
 *      the factorial sum of each of the digits in that
 *      number, then the boolean flag returns true.
 *      Otherwise, it will return false.
 */

 public class ExtraCreditProgram1
 {
    public static void main(String[] args)
    {
        int num = 0;
        int index;

        for (index = 0; index <= 99999; index++)
        {
            num = index;

            if (factorialCheck(num) == true)
            {
                System.out.println(num);
            }
        }
    }

    public static boolean factorialCheck(int number)
    {
        String strNum = number + "";
        char charNum = ' ';
        int inCount;
        int strLength = strNum.length();
        int factSum = 0;
        boolean flag = false;

        for (inCount = 0; inCount < strLength; inCount++)
        {
            charNum = strNum.charAt(inCount);

            switch (charNum)
            {
                case '0':
                case '1':
                    factSum = factSum + 1;
                    break;
                case '2':
                    factSum = factSum + (1 * 2);
                    break;
                case '3':
                    factSum = factSum + (1 * 2 * 3);
                    break;
                case '4':
                    factSum = factSum + (1 * 2 * 3 * 4);
                    break;
                case '5':
                    factSum = factSum +
                        (1 * 2 * 3 * 4 * 5);
                    break;
                case '6':
                    factSum = factSum +
                        (1 * 2 * 3 * 4 * 5 * 6);
                    break;
                case '7':
                    factSum = factSum +
                        (1 * 2 * 3 * 4 * 5 * 6 * 7);
                    break;
                case '8':
                    factSum = factSum +
                        (1 * 2 * 3 * 4 * 5 * 6 * 7 * 8);
                    break;
                case '9':
                    factSum = factSum +
                        (1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9);
                    break;
                default:
                    break;
            }

            if (factSum == number)
            {
                flag = true;
            }
            else
            {
                flag = false;
            }
        }

        return flag;
    }
 }