############################################################################
#  The submit system, courtesy of Prof. Eisenstat
#  9/20/09
# Please name your solution files: hw2.scm, hw3.scm, hw4.scm, ...
# 
#  submit    assignment-number file(s)
#  unsubmit  assignment-number file(s)
#  check     assignment-number
#  protect   assignment-number file(s)
#  unprotect assignment-number file(s)
#  retrieve  assignment-number file(s)
#
#  The submit program can be invoked in six different ways:
#
#      /home/classes/cs201/bin/submit  2  hw2.scm
#
#  submits the named source file as your solution to homework #2;
#  for homework #3, please change 2 to 3 and hw2.scm to hw3.scm, etc;
#
#      /home/classes/cs201/bin/check  3
#
#  lists the files that you have submitted for homework #3;
#
#      /home/classes/cs201/bin/unsubmit  4  oops.scm
#
#  deletes the named file that you had submitted previously for homework #4
#  (i.e., withdraws it from submission, which is useful if you accidentally
#  submit the wrong file);
#
#      /home/classes/cs201/bin/protect  5  hw5.scm
#
#  protects the named file that you submitted previously for homework #5 (so
#  it cannot be deleted accidentally); and
#
#      /home/classes/cs201/bin/unprotect  6  hw6.scm
#
#  unprotects the named file that you submitted previously for homework #6
#  (so it can be deleted); and
#
#      /home/classes/cs201/bin/retrieve  7  hw7.scm
#
#  retrieves a copy of the named file that you submitted previously for
#  homework #7 (in case you accidentally delete your own copy).
#
############################################################################