laravel 5- css and js are not loading with URL::assets

I am using laravel 5.2 and I have problem with the assets url , I do not manage to call css to or js links

<script src=""></script>

or

<script src=""></script>

the url in html is: http://localhost/site/js/...js.

I have tried to add public but still not working

via Chebli Mohamed