• The first form returns the positi

• The first form returns the position of the first element in the range [beg,end) that is also in the
range [searchBeg,searchEnd).
• The second form returns the position of the first element in the range [beg,end) for which any
call
op(elem,searchElem)
with all elements of [searchBeg,searchEnd) yields true.
• Both forms return end if no matching elements are found.
• Note that op should not change its state during a function call. See Section 10.1.4, page 483, for
details.
• op should not modify the passed arguments.
• By using reverse iterators, you can find the last of several possible values.
• These algorithms were not part of the original STL.
• Before C++11, these algorithms required forward iterators instead of input iterators for the range
[beg,end).
• Complexity: linear (at most, numElems*numSearchElems comparisons or calls of op(), respectively).
The following example demonstrates the use of find_first_of():