=====set_union=====
Syntax:

<code>
    #include <algorithm>
    output_iterator set_union( input_iterator start1, input_iterator end1, input_iterator2 start2, input_iterator2 end2, output_iterator result );
    output_iterator set_union( input_iterator start1, input_iterator end1, input_iterator2 start2, input_iterator2 end2, output_iterator result, StrictWeakOrdering cmp );
</code>

The set_union() algorithm computes the sorted union of the two sorted ranges [start1,end1)
and [start2,end2) and stores it starting at result.

The return value of set_union() is an iterator to the end of the union range.

set_union() runs in [[/complexity|linear time]].

Related Topics: [[includes]], [[merge]], [[set_difference]], [[set_intersection]], [[set_symmetric_difference]]