> prints
vertices for facets by their point coordinates ('p')</li>
<li><a href="io.c#printridge">qh_printridge</a> print all
fields for a ridge ('f')</li>
<li><a href="io.c#printvdiagram">qh_printvdiagram</a> print
voronoi diagram as Voronoi vertices for each input pair</li>
<li><a href="io.c#printvertex">qh_printvertex</a> print all
fields for a vertex ('f')</li>
<li><a href="io.c#printvertexlist">qh_printvertexlist</a>
print vertices used by a list or set of facets ('f')</li>
<li><a href="io.c#printvertic