multimap::swap
Exchanges the elements of two multimaps.
void swap(
multimap<Key, Type, Traits, Allocator>& _Right
);
Parameters
- _Right
The multimap providing the elements to be swapped, or the multimap whose elements are to be exchanged with those of the multimap _Left.
Remarks
The member function invalidates no references, pointers, or iterators that designate elements in the two multimaps whose elements are being exchanged.
Example
// multimap_swap.cpp
// compile with: /EHsc
#include <map>
#include <iostream>
int main( )
{
using namespace std;
multimap <int, int> m1, m2, m3;
multimap <int, int>::iterator m1_Iter;
typedef pair <int, int> Int_Pair;
m1.insert ( Int_Pair ( 1, 10 ) );
m1.insert ( Int_Pair ( 2, 20 ) );
m1.insert ( Int_Pair ( 3, 30 ) );
m2.insert ( Int_Pair ( 10, 100 ) );
m2.insert ( Int_Pair ( 20, 200 ) );
m3.insert ( Int_Pair ( 30, 300 ) );
cout << "The original multimap m1 is:";
for ( m1_Iter = m1.begin( ); m1_Iter != m1.end( ); m1_Iter++ )
cout << " " << m1_Iter -> second;
cout << "." << endl;
// This is the member function version of swap
m1.swap( m2 );
cout << "After swapping with m2, multimap m1 is:";
for ( m1_Iter = m1.begin( ); m1_Iter != m1.end( ); m1_Iter++ )
cout << " " << m1_Iter -> second;
cout << "." << endl;
// This is the specialized template version of swap
swap( m1, m3 );
cout << "After swapping with m3, multimap m1 is:";
for ( m1_Iter = m1.begin( ); m1_Iter != m1.end( ); m1_Iter++ )
cout << " " << m1_Iter -> second;
cout << "." << endl;
}
The original multimap m1 is: 10 20 30. After swapping with m2, multimap m1 is: 100 200. After swapping with m3, multimap m1 is: 300.
Requirements
Header: <map>
Namespace: std