 of sorted or unsorted set
</li>
<li><a href="qset_r.c#setaddsorted">qh_setaddsorted</a>
add an element to a sorted set </li>
<li><a href="qset_r.c#setappend">qh_setappend</a> append
an element to a set </li>
<li><a href="qset_r.c#setappend_set">qh_setappend_set</a>
append a set of elements to a set </li>
<li><a href="qset_r.c#setappend2ndlast">qh_setappend2ndlast</a>
add an element as the next to the last element in
a set </li>
<li><a href="qset_r.c#setlarger">qh_setlarger</a> return
a larger set with the 