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  


files #f,"input.txt"
if #f hasanswer() = 1 then print "File does not exist"
files #f,"docs"
if #f hasanswer() = 1 then print "File does not exist"
if #f isDir()     = 0 then print "This is a directory"
 