実装課題の回答例
==================

code1 (add) の例
------------------
.. literalinclude:: code/code1.py
    :language: python

DateEx の例（シンプル版）
--------------------------
.. literalinclude:: code/dateex1.py
    :language: python


DateEx の例（高機能版）
--------------------------
.. literalinclude:: code/dateex2.py
    :language: python


Houganの例
--------------------------
.. literalinclude:: code/hougan.py
    :language: python