// LANGCAY, JEREMY M

// CCP 1101 ITBC

// PASCAL TRIANGLE

​

​

using System;

​

namespace PascalTriangle

{

   public class Program

    {

        public static void Main(string[] args)

        {

            string input;

            int rows;

            int sum = 1;

            int totalRows = 0;

            int totalTriangle = 0;

            int step;

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

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

            input = Console.ReadLine();

            if (Int32.TryParse(input, out rows) == true)

            {

                                if (rows > 25)

                {

                    Console.WriteLine("Input greater than 25 is not allowed.");

                }

                else if (rows < 0)

                {

                    Console.WriteLine("Input less than 0 is not allowed.");

                }

                else

                {

                    for (int i = 0; i < rows; i++)

                    {

                        for (int j = 0; j <= i; j++)

                        {

                            if (j == 0 || i == 0)

                                sum = 1;

                            else

                                sum = sum * (i - j + 1) / j;

                            totalRows += sum;

                        }

                    }

                    for (int i = 0; i < rows + 2; i++)

                    {

                        int totalSpaces = 0;

                        for (int spaces = 1; spaces <= rows - i; spaces++) 

                            Console.Write(" ");

                        for (int j = 0; j <= i; j++)

                        {

                            if (j == 0 || i == 0)

                                sum = 1;

                            else

                                sum = sum * (i - j + 1) / j;

​

                            totalSpaces += sum;

                            Console.Write(sum + " ");

​

                        }

                        Console.WriteLine();

​

​

                        totalTriangle = totalSpaces;

                    }

                    step = rows + 1;

                    Console.WriteLine();

                    Console.WriteLine("The sum of numbers above row {0} is {1}. The sum of numbers in row {2} is {3}.", rows, totalRows, step, totalTriangle);

                    Console.ReadLine();

                }

            }

        }

    }

}

​