Task

Verify that a file called     input.txt     and   a directory called     docs     exist.



This should be done twice:  

   once for the current working directory,   and
   once for a file and a directory in the filesystem root.


Optional criteria (May 2015):   verify it works with:

   zero-length files
   an unusual filename:     `Abdu'l-Bahá.txt  


: .exists ( str len -- ) 2dup file-status nip 0= if ."  exists" else ."  does not exist" then type ;
 s" input.txt" .exists
s" /input.txt" .exists
 s" docs" .exists
s" /docs" .exists