优先队列

 1 #include <iostream>
 2 #include <vector>
 3 #include <queue>
 4 #include <functional>
 5 #include <string>
 6 using namespace std;
 7 
 8 // Empty the priority queue and print its contents.
 9 template <typename PriorityQueue>
10 void dumpContents( const string & msg, PriorityQueue & pq )
11 {
12     cout << msg << ":" << endl;
13     while( !pq.empty( ) )
14     {
15         cout << pq.top( ) << endl;
16         pq.pop( );
17     }
18 }
19 
20 // Do some inserts and removes (done in dumpContents).
21 int main( )
22 {
23     priority_queue<int>                          maxPQ;
24     priority_queue<int,vector<int>,greater<int>> minPQ;
25 
26     minPQ.push( 4 ); minPQ.push( 3 ); minPQ.push( 5 );
27     maxPQ.push( 4 ); maxPQ.push( 3 ); maxPQ.push( 5 );
28 
29     dumpContents( "minPQ", minPQ );
30     dumpContents( "maxPQ", maxPQ );
31 
32     return 0;
33 }