queue 用法举例

queue member functions


#include "stdafx.h"
#include "stdlib.h"
#include <stdio.h>
#include <iostream>
#include <queue>
#include <vector>
#include <list>




void main()
{
using namespace std;
// Declares queue with default deque base container
// queue <char> q1;
//
// // Explicitly declares a queue with deque base container
// queue <char, deque<char> > q2;
//
// // These lines don't cause an error, even though they
// // declares a queue with a vector base container
// queue <int, vector<int> > q3;
// q3.push( 10 );
// // but the following would cause an error because vector has
// // no pop_front member function
// // q3.pop( );
//
// // Declares a queue with list base container
// queue <int, list<int> > q4;


// The second member function copies elements from a container
list<int> li1;
li1.push_back( 1 );
li1.push_back( 2 );
queue <int, list<int> > q5( li1 );
cout << "The element at the front of queue q5 is "
<< q5.front( ) << "." << endl;
cout << "The element at the back of queue q5 is "
<< q5.back( ) << "." << endl;






system("Pause");
}