Data commit

Task/Variable-declaration-reset/Java/variable-declaration-reset.java

@@ -0,0 +1,25 @@
+public class VariableDeclarationReset {
+    public 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) System.out.println(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) System.out.println(i);
+            gprev = curr;
+        }
+    }
+}