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operator< (multiset)

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

bool operator<( 
   const multiset <Key, Traits, Allocator>& _Left, 
   const multiset <Key, Traits, Allocator>& _Right 
);

_Left

An object of type multiset.

_Right

An object of type multiset.

true if the multiset on the left side of the operator is strictly less than the multiset on the right side of the operator; otherwise false.

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

// multiset_op_lt.cpp
// compile with: /EHsc
#include <set>
#include <iostream>

int main( )
{
   using namespace std;
   multiset <int> s1, s2, s3;
   int i;

   for ( i = 0 ; i < 3 ; i++ )
   {
      s1.insert ( i );
      s2.insert ( i * i );
      s3.insert ( i - 1 );
   }

   if ( s1 < s2 )
      cout << "The multiset s1 is less than "
           << "the multiset s2." << endl;
   else
      cout << "The multiset s1 is not less than "
           << "the multiset s2." << endl;

   if ( s1 < s3 )
      cout << "The multiset s1 is less than "
           << "the multiset s3." << endl;
   else
      cout << "The multiset s1 is not less than "
           << "the multiset s3." << endl;
}
The multiset s1 is less than the multiset s2.
The multiset s1 is not less than the multiset s3.

Header: <set>

Namespace: std

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