Data update

Task/Variable-declaration-reset/C-sharp/variable-declaration-reset.cs

@@ -0,0 +1,37 @@
+internal class Program
+{
+    private static void Main(string[] args)
+    {
+        int[] s = { 1, 2, 2, 3, 4, 4, 5 };
+
+        // There is no output as 'prev' is created anew each time
+        // around the loop and set to zero.
+        for (int i = 0; i < s.Length; ++i)
+        {
+            int curr = s[i];
+            int prev = 0;
+            //          int prev; // triggers "error: variable prev might not have been initialized"
+            if (i > 0 && curr == prev)
+            {
+                Console.WriteLine(i);
+            }
+
+            prev = curr;
+        }
+
+        int gprev = 0;
+
+        // Now 'gprev' is used and reassigned
+        // each time around the loop producing the desired output.
+        for (int i = 0; i < s.Length; ++i)
+        {
+            int curr = s[i];
+            if (i > 0 && curr == gprev)
+            {
+                Console.WriteLine(i);
+            }
+
+            gprev = curr;
+        }
+    }
+}