printing addresses of argv members

ex15.c

@@ -53,7 +53,7 @@ int main(int argc, char *argv[])
 
     char **arg = argv;
     for(i = 0; i < argc; i++) {
-        printf("argument %d is '%s'\n", i, *arg);
+        printf("argument %d is '%s' (address = %p)\n", i, *arg, arg);
         arg++;
     }