rograms are included at the end of this chapter (<a class="xref" href="libpq-example.html" title="34.22. Example Programs">Section 34.22</a>) to show how
  to write programs that use <span class="application">libpq</span>.  There are also several
  complete examples of <span class="application">libpq</span> applications in the
  directory <code class="filename">src/test/examples</code> in the source code distribution.
 </p><p>
  Client programs that use <span class="application">libpq</span> must
  includ