Maximum of three integers
=========================

#. Analyse which of these functions compute correctly the maximum of
   three integers. You can use the three following sets of values for
   parameters ``(a, b, c)``: ``(1, 2, 3)``, ``(2, 3, 1)`` and ``(3, 1, 2)``.

   .. code:: python

       def func1(a, b, c):
           maxim = a
           if b > maxim:
               maxim = b
           elif c > maxim:
               maxim = c
           return maxim

   | 

   .. code:: python

       def func2(a, b, c):
           maxim = a
           if b > maxim:
               maxim = b
           if c > maxim:
               maxim = c
           return maxim

   | 

   .. code:: python

       def func3(a, b, c):
           maxim = a
           if b > maxim:
               maxim = b
           else:
               maxim = c
           return maxim



#. Write the function ``maximum_of_3`` that takes three integer values
   as input and returns the maximum without using the ``max`` function
   of Python. Use the previous correct code and devise other
   alternative codes.

   Save the function in the file ``maxim3.py``. The function must pass
   the following doctest:
   
   .. literalinclude:: maxim3.txt
      :language: python3
      :lines: 2-

   .. note::

      You can download a file with tests :download:`maxim3.txt <maxim3.txt>`

   .. rubric:: Solution

   You have some solutions in the file :download:`maxim3.py
   <solutions/maxim3.py>`