Clear content
All the elements in the container are dropped: their destructors are called, and then they are removed from the container, leaving it with a size of 0.
Parameters
none
Return value
none
Example
// multimap::clear
#include <iostream>
#include <map>
using namespace std;
int main ()
{
multimap<char,int> mymultimap;
multimap<char,int>::iterator it;
mymultimap.insert(pair<char,int>('b',80));
mymultimap.insert(pair<char,int>('b',120));
mymultimap.insert(pair<char,int>('q',360));
cout << "mymultimap contains:\n";
for ( it=mymultimap.begin() ; it != mymultimap.end(); it++ )
cout << (*it).first << " => " << (*it).second << endl;
mymultimap.clear();
mymultimap.insert(pair<char,int>('a',11));
mymultimap.insert(pair<char,int>('x',22));
cout << "mymultimap contains:\n";
for ( it=mymultimap.begin() ; it != mymultimap.end(); it++ )
cout << (*it).first << " => " << (*it).second << endl;
return 0;
}
|
Output:
mymultimap contains:
b => 80
b => 120
q => 360
mymap contains:
a => 11
x => 22
|
Complexity
Linear in size (destructors).
See also
