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  


      test% = OPENIN("input.txt")
      IF test% THEN
        CLOSE #test%
        PRINT "File input.txt exists"
      ENDIF
 
      test% = OPENIN("\input.txt")
      IF test% THEN
        CLOSE #test%
        PRINT "File \input.txt exists"
      ENDIF
 
      test% = OPENIN("docs\NUL")
      IF test% THEN
        CLOSE #test%
        PRINT "Directory docs exists"
      ENDIF
 
      test% = OPENIN("\docs\NUL")
      IF test% THEN
        CLOSE #test%
        PRINT "Directory \docs exists"
      ENDIF