hash_set::begin
참고
이 API는 사용되지 않습니다.unordered_set 클래스를 대신 사용하는 것이 좋습니다.
Returns an iterator that addresses the first element in the hash_set.
const_iterator begin( ) const;
iterator begin( );
반환 값
A bidirectional iterator addressing the first element in the hash_set or the location succeeding an empty hash_set.
설명
If the return value of begin is assigned to a const_iterator, the elements in the hash_set object cannot be modified. If the return value of begin is assigned to an iterator, the elements in 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_begin.cpp
// compile with: /EHsc
#include <hash_set>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_set <int> hs1;
hash_set <int>::iterator hs1_Iter;
hash_set <int>::const_iterator hs1_cIter;
hs1.insert( 1 );
hs1.insert( 2 );
hs1.insert( 3 );
hs1_Iter = hs1.begin( );
cout << "The first element of hs1 is " << *hs1_Iter << endl;
hs1_Iter = hs1.begin( );
hs1.erase( hs1_Iter );
// The following 2 lines would err because the iterator is const
// hs1_cIter = hs1.begin( );
// hs1.erase( hs1_cIter );
hs1_cIter = hs1.begin( );
cout << "The first element of hs1 is now " << *hs1_cIter << endl;
}
요구 사항
헤더: <hash_set>
네임스페이스: stdext