hash_set::find
참고
이 API는 사용되지 않습니다.unordered_set 클래스를 대신 사용하는 것이 좋습니다.
Returns an iterator addressing the location of an element in a hash_set that has a key equivalent to a specified key.
iterator find(
const Key& _Key
);
const_iterator find(
const Key& _Key
) const;
매개 변수
- _Key
The argument key to be matched by the sort key of an element from the hash_set being searched.
반환 값
An iterator or const_iterator that addresses the location of an element equivalent to a specified key or that addresses the location succeeding the last element in the hash_set if no match is found for the key.
설명
The member function returns an iterator that addresses an element in the hash_set whose sort key is equivalent to the argument key under a binary predicate that induces an ordering based on a less-than comparability relation.
If the return value of find is assigned to a const_iterator, the hash_set object cannot be modified. If the return value of find is assigned to an iterator, the hash_set object can be modified.
Visual C++.NET 2003에서, <hash_map> 및 <hash_set> 헤더 파일의 멤버는 더 이상 std 네임스페이스에 존재하지 않습니다. 대신 stdext 네임스페이스로 이동되었습니다. 자세한 내용은 stdext 네임스페이스를 참조하십시오.
예제
// hash_set_find.cpp
// compile with: /EHsc
#include <hash_set>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_set <int> hs1;
hash_set <int> :: const_iterator hs1_AcIter, hs1_RcIter;
hs1.insert( 10 );
hs1.insert( 20 );
hs1.insert( 30 );
hs1_RcIter = hs1.find( 20 );
cout << "The element of hash_set hs1 with a key of 20 is: "
<< *hs1_RcIter << "." << endl;
hs1_RcIter = hs1.find( 40 );
// If no match is found for the key, end( ) is returned
if ( hs1_RcIter == hs1.end( ) )
cout << "The hash_set hs1 doesn't have an element "
<< "with a key of 40." << endl;
else
cout << "The element of hash_set hs1 with a key of 40 is: "
<< *hs1_RcIter << "." << endl;
// The element at a specific location in the hash_set can be found
// by using a dereferenced iterator addressing the location
hs1_AcIter = hs1.end( );
hs1_AcIter--;
hs1_RcIter = hs1.find( *hs1_AcIter );
cout << "The element of hs1 with a key matching "
<< "that of the last element is: "
<< *hs1_RcIter << "." << endl;
}
요구 사항
헤더: <hash_set>
네임스페이스: stdext