queue::queue

建構是空的或為基本容器物件複本的佇列。

queue( ); 
explicit queue(
   const container_type& _Right
);

參數

• _Right
  已建構的佇列是複本的 const 容器。

備註

佇列的預設基礎容器是 deque。 您也可以指定清單做為基底的容器，不過，您無法指定向量，，因為它缺少必要的 pop_front 成員函式。

範例

// queue_queue.cpp
// compile with: /EHsc
#include <queue>
#include <vector>
#include <list>
#include <iostream>

int 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;
}

需求

標題: <queue>

命名空間: std

請參閱

參考

queue Class

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