operator<
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operator< (<queue>)

 

Tests if the queue object on the left side of the operator is less than the queue object on the right side.


      bool operator<(
   const queue <Type, Container>& _Left,
   const queue <Type, Container>& _Right,
);

_Left

An object of type queue.

_Right

An object of type queue.

true if the queue on the left side of the operator is less than and not equal to the queue on the right side of the operator; otherwise false.

The comparison between queue objects is based on a pairwise comparison of their elements. The less-than relationship between two queue objects is based on a comparison of the first pair of unequal elements.

Example

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

int main( )
{
   using namespace std;

   // Declares queues with default deque base container
   queue <int> q1, q2, q3;

   q1.push( 1 );
   q1.push( 2 );
   q2.push( 5 );
   q2.push( 10 );
   q3.push( 1 );
   q3.push( 2 );

   if ( q1 < q2 )
      cout << "The queue q1 is less than the queue q2." << endl;
   else
      cout << "The queue q1 is not less than the queue q2." << endl;

   if ( q1 < q3 )
      cout << "The queue q1 is less than the queue q3." << endl;
   else
      cout << "The queue q1 is not less than the queue q3." << endl;
}
The queue q1 is less than the queue q2.
The queue q1 is not less than the queue q3.

Requirements

Header: <queue>

Namespace: std

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