searching rest

Sortering/Program.cs

@@ -1,5 +1,6 @@
 using Sortering;
 using System.Diagnostics;
+using System.Text.RegularExpressions;
 
 internal class Program
 {
@@ -13,7 +14,9 @@ internal class Program
             { "insertionsort", SortInsertion },
             { "bubblesort", SortBubble },
             { "mkarray", MkArray },
-            { "cat", Cat },
+            { "print", Print },
+            { "sequentialfind", SequentialFind },
+            { "binaryfind", BinaryFind },
             { "exit", _ => _running = false }
         };
 
@@ -144,7 +147,57 @@ internal class Program
         Console.WriteLine($"Sorted array in {sw.ElapsedMilliseconds} ms");
     }
 
-    private static void Cat(string[] args)
+    private static void SequentialFind(string[] args)
+    {
+        if (_ints == null)
+        {
+            Console.WriteLine("No array. Use mkarray first.");
+            return;
+        }
+
+        if (args.Length < 1 || !int.TryParse(args[0], out int value))
+        {
+            Console.WriteLine("Usage: find <value>");
+            return;
+        }
+
+        var sw = Stopwatch.StartNew();
+        int match = Sort.SequentialFind(_ints, value);
+
+        sw.Stop();
+
+        if (match == -1)
+            Console.WriteLine($"Found no match in {sw.ElapsedMilliseconds} ms");
+        else
+            Console.WriteLine($"Found match at {match} in {sw.ElapsedMilliseconds} ms");
+    }
+
+    private static void BinaryFind(string[] args)
+    {
+        if (_ints == null)
+        {
+            Console.WriteLine("No array. Use mkarray first.");
+            return;
+        }
+
+        if (args.Length < 1 || !int.TryParse(args[0], out int value))
+        {
+            Console.WriteLine("Usage: find <value>");
+            return;
+        }
+
+        var sw = Stopwatch.StartNew();
+        int match = Sort.BinaryFind(_ints, value);
+
+        sw.Stop();
+
+        if (match == -1)
+            Console.WriteLine($"Found no match in {sw.ElapsedMilliseconds} ms");
+        else
+            Console.WriteLine($"Found match at {match} in {sw.ElapsedMilliseconds} ms");
+    }
+
+    private static void Print(string[] args)
     {
         if (_ints == null)
         {
@@ -166,7 +219,7 @@ internal class Program
 
         _ints = new int[count];
         for (int i = 0; i < count; i++)
-            _ints[i] = _random.Next(count);
+            _ints[i] = _random.Next(1000 + (int)(count * 0.1));
 
         Console.WriteLine($"Created array with {count} elements");
     }

Sortering/Sort.cs

@@ -40,5 +40,36 @@
                 }
             }
         }
+
+        public static int SequentialFind(int[] haystack, int needle)
+        {
+            for (int i = 0; i < haystack.Length; i++)
+            {
+                if (haystack[i] == needle)
+                {
+                    return i;
+                }
+            }
+
+            return -1;
+        }
+
+        public static int BinaryFind(int[] haystack, int needle)
+        {
+            int min = 0;
+            int max = haystack.Length -1;
+            int i = -1;
+
+            while (min <= max && i == -1)
+            {
+                int mid = (min + max) / 2;
+
+                if (needle > haystack[mid]) min = mid + 1;
+                else if (needle < haystack[mid]) max = mid - 1;
+                else i = mid;
+            }
+
+            return i;
+        }
     }
 }