Set - STL

std::set

.count()
.insert()

::iterator
.begin()
.end()

요소 타입의 비교 연산자

std::set_intersection()
std::set_union()
std::set_difference()
std::set_symetric_difference()

#include <set>
#include <string>
set<string> word_exclusion;

while ( cin >> tword )
{

if ( word_exclusion.count( tword ))

continue;

words[ tword ]++;

}

set<string>::iterator it = iset.begin();
for ( ; it != iset.end(); ++it )

cout << *it << ' ';

cout << endl;