Data commit

Task/Fibonacci-n-step-number-sequences/C-sharp/fibonacci-n-step-number-sequences.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Fibonacci
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            PrintNumberSequence("Fibonacci", GetNnacciNumbers(2, 10));
+            PrintNumberSequence("Lucas", GetLucasNumbers(10));
+            PrintNumberSequence("Tribonacci", GetNnacciNumbers(3, 10));
+            PrintNumberSequence("Tetranacci", GetNnacciNumbers(4, 10));
+            Console.ReadKey();
+        }
+
+        private static IList<ulong> GetLucasNumbers(int length)
+        {
+            IList<ulong> seedSequence = new List<ulong>() { 2, 1 };
+            return GetFibLikeSequence(seedSequence, length);
+        }
+
+        private static IList<ulong> GetNnacciNumbers(int seedLength, int length)
+        {
+            return GetFibLikeSequence(GetNacciSeed(seedLength), length);
+        }
+
+        private static IList<ulong> GetNacciSeed(int seedLength)
+        {
+            IList<ulong> seedSquence = new List<ulong>() { 1 };
+
+            for (uint i = 0; i < seedLength - 1; i++)
+            {
+                seedSquence.Add((ulong)Math.Pow(2, i));
+            }
+
+            return seedSquence;
+        }
+
+        private static IList<ulong> GetFibLikeSequence(IList<ulong> seedSequence, int length)
+        {
+            IList<ulong> sequence = new List<ulong>();
+
+            int count = seedSequence.Count();
+
+            if (length <= count)
+            {
+                sequence = seedSequence.Take((int)length).ToList();
+            }
+            else
+            {
+                sequence = seedSequence;
+
+                for (int i = count; i < length; i++)
+                {
+                    ulong num = 0;
+
+                    for (int j = 0; j < count; j++)
+                    {
+                        num += sequence[sequence.Count - 1 - j];
+                    }
+
+                    sequence.Add(num);
+                }
+            }
+
+            return sequence;
+        }
+
+        private static void PrintNumberSequence(string Title, IList<ulong> numbersequence)
+        {
+            StringBuilder output = new StringBuilder(Title).Append("   ");
+
+            foreach (long item in numbersequence)
+            {
+                output.AppendFormat("{0}, ", item);
+            }
+
+            Console.WriteLine(output.ToString());
+        }
+    }
+}