=====empty===== Syntax:


    #include 
    bool empty() const;

The empty() function returns true if the multiset has no elements, false otherwise. For example, the following code uses empty() as the stopping condition on a while loop to clear a multiset and display its contents in reverse order:


    multiset ms;
    for( int i = 0; i < 5; i++ ) {
      ms.insert(i);
    }
    while( !ms.empty() ) {
        multiset::iterator iter = ms.end();
        iter--;
        cout << *iter << endl;
        ms.erase( iter );
    }