diff --git a/ex18.c b/ex18.c
index 34bf3e1..5a5a77a 100644
--- a/ex18.c
+++ b/ex18.c
@@ -80,6 +80,13 @@ void test_sorting(int *numbers, int count, compare_cb cmp)
     printf("\n");
 
     free(sorted);
+
+    unsigned char *data = (unsigned char *)cmp;
+
+    for(i = 0; i < 25; i++) {
+        printf("%0x:", data[i]);
+    }
+    printf("\n");
 }