priority_queue::empty

Tests if a priority_queue is empty.

bool empty( ) const;

반환 값

true if the priority_queue is empty; false if the priority_queue is nonempty.

예제

// pqueue_empty.cpp
// compile with: /EHsc
#include <queue>
#include <iostream>

int main( )
{
   using namespace std;

   // Declares priority_queues with default deque base container
   priority_queue <int> q1, s2;

   q1.push( 1 );

   if ( q1.empty( ) )
      cout << "The priority_queue q1 is empty." << endl;
   else
      cout << "The priority_queue q1 is not empty." << endl;

   if ( s2.empty( ) )
      cout << "The priority_queue s2 is empty." << endl;
   else
      cout << "The priority_queue s2 is not empty." << endl;
}

요구 사항

Header: <queue>

네임스페이스: std

참고 항목

참조

priority_queue 클래스

priority_queue 함수

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