# L-22 MCS 260 Wed 3 Mar 2010 : dialogue
#
# The module dialogue defines the dialogue
# with the user: show questions, prompt for
# a choice, show the outcome and tally.

import quand

def show_question(q,L):
   """
   Displays the questions and the answers
   on input is the number q of the question
   and the list L of answers.
   """
   print quand.questions[q]
   choice = 1
   for answer in L:
      p = '%d' % choice + '. '
      p = p + quand.answers[q][answer]
      print p
      choice = choice + 1

def prompt_choice(n):
   """
   Asks the user for a choice
   where n is the number of choices.
   """
   m = 'type a number between 1'
   m = m + ' and %d : ' % n
   while True:
      c = raw_input(m)
      if int(c) > 0 and int(c) <= n: break
      print 'please try again'
   return int(c)

def show_outcome(b):
   """
   Reports outcome to user
   where b is True or False.
   """
   if b:
      print 'this is the correct answer'
   else:
      print 'wrong, please try again'

def show_tally(t):
   """
   Shows final tally, t is list.
   """
   s = '#correct : %d' % t[1]
   s += ' #wrong : %d' % t[0]
   f = 100.0*t[1]/sum(t)
   s += ' -> %.2f%%' % f
   print s