multiset的插入与删除

<span style="font-size:14px;">#include <iostream>
#include<functional>
#include <set>
#include<iterator>
#include <algorithm>
using namespace std;

int main ()
{
typedef multiset<int,greater<int> > IntSet;
IntSet myset;

int myints[] = {75,23,65,42,23};

for( int i = 0; i < 5; i++ )
{
myset.insert( myints[i] );
}

for( IntSet::const_iterator cite = myset.begin(); cite != myset.end(); ++cite )
{
cout << *cite << ' ';  // 75 65 42 23 23
}

multiset< int, greater<int> >::iterator ite = find( myset.begin(), myset.end(), 23 );

if( ite != myset.end() )
{
myset.erase(ite);  //只删除一个，而 myset.erase(23); 会删除所有值为23的元素
}

cout << endl;
for( IntSet::const_iterator cite = myset.begin(); cite != myset.end(); ++cite )
{
cout << *cite << ' ';  // 75 65 42 23
}

std::cout << '\n';

return 0;
}

</span>