can i start download automatically when click on wordpress post

My question is very simple (maybe its difficult)

in my wordpress blog, its possible to start a download when a visitor click on a simple post ? ( obviusley the same download )

its very difficult for me :/

have you any tips&tricks ?

no php its requires or no ?

<?php
echo "something to do";
?>

i have already tried a lot of plugin but nothing do this things i have some difficult with this way

thanks a lot for the writer best regards