//ISIDRO, CLARENCE JAMES M.

//DULCE, JOSHUA K.

//CCP 1103 - SECTION

//FIBONACCI FACTORIAL SUM

​

​

​

using System;

​

namespace FibonacciFactorialSum

{

    public class Program

    {

        public static void Main(string[] args)

        {

            int number;

            int firstNumber = 0;

            int secondNumber = 1;

            int freezeNumber = 0;

            int sumFactorial = 0;

            string inputNumber;

​

            Console.WriteLine("Fibonacci Factorial Sum");

            Console.Write("Enter a number: ");

            inputNumber = Console.ReadLine();

​

            if (Int32.TryParse(inputNumber, out number) == true)

            {

                if (number >= 1 && (number <= 6))

                {

                    for (int i = 2; i <= number; i++)

                    {

                        freezeNumber = firstNumber + secondNumber;

                        firstNumber = secondNumber;

                        secondNumber = freezeNumber;

                        int temporaryValue = 1;

                        for (int j = 1; j <= freezeNumber; j++)

                        {

                            temporaryValue *= j;

                        }

                        sumFactorial += temporaryValue;

                    }

                    sumFactorial = sumFactorial + 1;

                    Console.WriteLine("the fibonacci factorial sum of " + freezeNumber + " is {0:#,0}", sumFactorial);

                }

                else if (number <= 0)

                {

                    Console.Write("Zero or negative input is not allowed");

                }

                else

                {

                    Console.Write("Please input a number within the range of 1 to 6");

                }

​

            }

            else

            {

                Console.Write("Invalid Input. Enter a numeric value.");

            }

        }

    }

}