//CAPITULO, JORBEN LANCE G.

//CONCEPCION, JEROME

//CCP 1103 - ITBC

//PASCAL'S TRIANGLE

​

using System;

using System.IO;

​

namespace PascalsTriangle

{

    public class PascalsTriangle

    {

        static string textFile = @"C:\Users\Jorben\Documents\pascal.txt";

        public static void Main(string[] args)

        {

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

            if (File.Exists(textFile) == true)

            {

                StreamReader file = new StreamReader(textFile);

                string line;

                int inputRowNumber;

​

                while ((line = file.ReadLine()) != null)

                {

                    if (Int32.TryParse(line, out inputRowNumber) == true)

                    {

                        if (inputRowNumber < 0)

                        {

                            Console.WriteLine("Input error. Input number less than zero or greater than 25 is not allowed.");

                            Console.WriteLine(" ");

                        }

                        else if (inputRowNumber > 25)

                        {

                            Console.WriteLine("Input error. Input number less than zero or greater than 25 is not allowed.");

                            Console.WriteLine(" ");

                        }

                        else

                        {

                            int sum = 1;

                            int sumRows = 1;

                            int sumAboveRows = 1;

​

                            if (inputRowNumber == 0)

                            {

                                sumAboveRows = 0;

                                Console.Write("The sum of numbers above row {0:#,0} is 0.", inputRowNumber);

                            }

                            else

                            {

                                int counter = 1;

                                while (counter < inputRowNumber)

                                {

                                    sum = sum * 2;

                                    sumAboveRows = sumAboveRows + sum;

                                    counter = counter + 1;

                                }

                                Console.Write("The sum of numbers above row {0:#,0} is {1:#,0}.", inputRowNumber, sumAboveRows);

                            }

                            int secondCounter = 1;

                            while (secondCounter <= inputRowNumber + 1)

                            {

                                sumRows = sumRows * 2;

                                secondCounter = secondCounter + 1;

                            }

                            Console.WriteLine(" The sum of numbers in row {0:#,0} is {1:#,0}.", inputRowNumber + 1, sumRows);

                            Console.WriteLine(" ");

                        }

                    }

                    else

                    {

                        Console.WriteLine("Invalid input. Please input a number from 0 to 25.");

                        Console.WriteLine(" ");

                    }

                }

                file.Close();

            }

            else

            {

                Console.WriteLine("Error. File not found.");

            }

            Console.ReadKey();

        }

    }

}