| multimap::operator= |
public member function |
multimap<Key,T,Compare,Allocator>&
operator= ( const multimap<Key,T,Compare,Allocator>& x ); |
|
Copy container content
Assigns a copy of the elements in x as the new content for the container.
The elements contained in the object before the call are dropped, and replaced by copies of those in multimap x, if any.
After a call to this member function, both the multimap object and x will have the same size and compare equal to each other.
Parameters
- x
- A multimap object with the same class template parameters (Key, T, Compare and Allocator).
Return value
*thisExample
// assignment operator with multimaps
#include <iostream>
#include <map>
using namespace std;
int main ()
{
multimap<char,int> first;
multimap<char,int> second;
first.insert(pair<char,int>('x',32));
first.insert(pair<char,int>('y',64));
first.insert(pair<char,int>('y',96));
first.insert(pair<char,int>('z',128));
second=first; // second now contains 4 ints
first=multimap<char,int>(); // and first is now empty
cout << "Size of first: " << int (first.size()) << endl;
cout << "Size of second: " << int (second.size()) << endl;
return 0;
}
|
Output:
Size of first: 0
Size of second: 4
|
Complexity
Linear on
sizes (destruction, copy construction).
See also
