hash_set::rbegin

참고

이 API는 사용되지 않습니다.unordered_set 클래스를 대신 사용하는 것이 좋습니다.

Returns an iterator addressing the first element in a reversed hash_set.

const_reverse_iterator rbegin( ) const; 
reverse_iterator rbegin( );

반환 값

A reverse bidirectional iterator addressing the first element in a reversed hash_set or addressing what had been the last element in the unreversed hash_set.

설명

rbegin is used with a reversed hash_set just as begin is used with a hash_set.

If the return value of rbegin is assigned to a const_reverse_iterator, then the hash_set object cannot be modified. If the return value of rbegin is assigned to a reverse_iterator, then the hash_set object can be modified.

rbegin can be used to iterate through a hash_set backwards.

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_rbegin.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>::reverse_iterator hs1_rIter;

   hs1.insert( 10 );
   hs1.insert( 20 );
   hs1.insert( 30 );

   hs1_rIter = hs1.rbegin( );
   cout << "The first element in the reversed hash_set is "
        << *hs1_rIter << "." << endl;

   // begin can be used to start an iteration 
   // throught a hash_set in a forward order
   cout << "The hash_set is: ";
   for ( hs1_Iter = hs1.begin( ) ; hs1_Iter != hs1.end( );
         hs1_Iter++ )
      cout << *hs1_Iter << " ";
   cout << endl;

   // rbegin can be used to start an iteration 
   // throught a hash_set in a reverse order
   cout << "The reversed hash_set is: ";
   for ( hs1_rIter = hs1.rbegin( ) ; hs1_rIter != hs1.rend( );
         hs1_rIter++ )
      cout << *hs1_rIter << " ";
   cout << endl;

   // A hash_set element can be erased by dereferencing to its key 
   hs1_rIter = hs1.rbegin( );
   hs1.erase ( *hs1_rIter );

   hs1_rIter = hs1.rbegin( );
   cout << "After the erasure, the first element "
        << "in the reversed hash_set is "<< *hs1_rIter << "."
        << endl;
}

요구 사항

헤더: <hash_set>

네임스페이스: stdext

참고 항목

참조

hash_set 클래스

표준 템플릿 라이브러리