ode>operator++</code>, then
    these operators will get used and the ones supplied by
    <code>output_iterator_helper</code> will never be instantiated.</p>

    <h3><a name="i_demo">Iterator Demonstration</a> and Test Program</h3>

    <p>The <cite><a href="iterators_test.cpp">iterators_test.cpp</a></cite>
    program demonstrates the use of the iterator templates, and can also be
    used to verify correct operation. The following is the custom iterator
    defined in the test program. It demonstrates a