Question 2 (5)
==============

Which of the following statements about the program below are true?

.. list-table::
   :align: left
   :header-rows: 1

   * * Statement
     * True
   * * The output of the following program run is empty, and the exit
       status is 0.

       .. code-block:: console
     
          $ ./example2 0
          $ echo $?
          0

     * 

.. list-table::
   :align: left
   :header-rows: 1

   * * Statement
     * True
   * * Output and exit status are:

       .. code-block:: console
     
          $ ./example2 1
          Foo()
          bar()
          ~Foo()
          $ echo $?
          0

     * 

.. list-table::
   :align: left
   :header-rows: 1

   * * Statement
     * True
   * * Output and exit status are:

       .. code-block:: console

          $ ./example2
          need one parameter
          $ echo $?
          0

     * 

.. list-table::
   :align: left
   :header-rows: 1

   * * Statement
     * True
   * * The program has a memory leak
     * 

.. list-table::
   :align: left
   :header-rows: 1

   * * Statement
     * True
   * * The program's behavior is undefined
     * 

*Note*: ``std::stoi()`` converts its parameter to ``int``, or raises
an exception if that is not convertible (e.g. ``"xxx"``)
  
.. literalinclude:: code/example2.cpp
   :language: c++
   :caption: :download:`code/example2.cpp`