//DULAY, BENEDICT BARRY G.

//CCP 1103 - ITDC

//PASCAL'S TRIANGLE

​

using System;

public class Program

{

    public static void Main(string[] args)

    {

        string inputDigit;

        int digit;

        int amount = 1;

        int sumNextRow = 1;

        int sumAllAboveRow = 1;

        Console.WriteLine("Pascal's Triangle.");

        Console.WriteLine();

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

        inputDigit = Console.ReadLine();

        if (Int32.TryParse(inputDigit, out digit) == true)

        {

            if (digit < 0)

            {

                Console.WriteLine("\nInput number less than zero is not allowed.");

            }

            else if (digit > 25)

            {

                Console.WriteLine("\nInput number greater than 25 is not allowed.");

            }

            else

            {

                if (digit == 0)

                {

                    sumAllAboveRow = 0;

                }

                else

                {

                    for (int counterOne = 1; counterOne < digit; counterOne++)

                    {

                        amount *= 2;

                        sumAllAboveRow += amount;

                    }

                }

                for (int counterTwo = 1; counterTwo <= digit + 1; counterTwo++)

                {

                    sumNextRow *= 2;

                }

                Console.WriteLine("\nThe sum of numbers above row " + digit + " is " + sumAllAboveRow + ". \nThe sum of the numbers in row " + (digit + 1) + " is " + sumNextRow + ".");

            }

        }

        else

        {

            Console.WriteLine("\nInvalid Input. Please Enter a numeric value.");

        }

    }

}