PrintSpiral

PrintSpiral.cs

using System;

namespace test
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 0; i < 10; i++)
            {
                PrintSpiral(i);
            }
        }

        private static void PrintSpiral(int n)
        {
            int[,] arr = new int[n, n];
            int x = 0;
            int y = 0;
            int c = 1;
            double direction = 0;
            for (int t = 0; t < n - 1; t++)
            {
                for (int j = 0; j < Math.Max(3 - t, 2); j++)
                {
                    for (int i = 0; i < n - t - 1; i++)
                    {
                        x += (int)Math.Cos(direction);
                        y += (int)Math.Sin(direction);
                        arr[y, x] = c++;
                    }
                    direction += Math.PI / 2;
                }
            }

            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    Console.Write(arr[i, j].ToString().PadLeft(c.ToString().Length) + " ");
                }
                Console.WriteLine();
            }
        }
    }
}