Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Returns an iterator to the first element in a hash_multiset with a key that is equal to or greater than a specified key.
const_iterator lower_bound(
const Key& _Key
) const;
iterator lower_bound(
const Key& _Key
);
Parameters
- _Key
The argument key to be compared with the sort key of an element from the hash_multiset being searched.
Return Value
An iterator or const_iterator that addresses the location of the first element in a hash_multiset with a key that is equal to or greater than the argument key, or that addresses the location succeeding the last element in the hash_multiset if no match is found for the key.
Remarks
In Visual C++ .NET 2003, members of the <hash_map> and <hash_set> header files are no longer in the std namespace, but rather have been moved into the stdext namespace. See The stdext Namespace for more information.
Example
// hash_multiset_lower_bound.cpp
// compile with: /EHsc
#define _DEFINE_DEPRECATED_HASH_CLASSES 0
#include <hash_set>
#include <iostream>
int main() {
using namespace std;
using namespace stdext;
hash_multiset <int> hms1;
hash_multiset <int> :: const_iterator hms1_AcIter, hms1_RcIter;
hms1.insert( 10 );
hms1.insert( 20 );
hms1.insert( 30 );
hms1_RcIter = hms1.lower_bound( 20 );
cout << "The element of hash_multiset hms1 with a key of 20 is: "
<< *hms1_RcIter << "." << endl;
hms1_RcIter = hms1.lower_bound( 40 );
// If no match is found for the key, end( ) is returned
if ( hms1_RcIter == hms1.end( ) )
cout << "The hash_multiset hms1 doesn't have an element "
<< "with a key of 40." << endl;
else
cout << "The element of hash_multiset hms1 with a key of 40 is: "
<< *hms1_RcIter << "." << endl;
// An element at a specific location in the hash_multiset can be found
// by using a dereferenced iterator that addresses the location
hms1_AcIter = hms1.end( );
hms1_AcIter--;
hms1_RcIter = hms1.lower_bound( *hms1_AcIter );
cout << "The element of hms1 with a key matching "
<< "that of the last element is: "
<< *hms1_RcIter << "." << endl;
}
Output
The element of hash_multiset hms1 with a key of 20 is: 20.
The hash_multiset hms1 doesn't have an element with a key of 40.
The element of hms1 with a key matching that of the last element is: 30.
Requirements
Header: <hash_set>
Namespace: stdext