operator!= (hash_set)

Tests if the hash_set object on the left side of the operator is not equal to the hash_set object on the right side.

bool operator!=( 
   const hash_set <Key, Traits, Allocator>& _Left, 
   const hash_set <Key, Traits, Allocator>& _Right 
);

Parameters

• _Left
  An object of type hash_set.

• _Right
  An object of type hash_set.

Return Value

true if the hash_sets are not equal; false if hash_sets are equal.

Remarks

The comparison between hash_set objects is based on a pairwise comparison between their elements. Two hash_sets are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.

In Visual C++ .NET 2003, members of the <hash_map> and <hash_set> header files are no longer in the std namespace, but rather have been moved into the stdext namespace. See The stdext Namespace for more information.

Example

// hash_set_op_ne.cpp
// compile with: /EHsc
#include <hash_set>
#include <iostream>

int main( ) 
{
   using namespace std;
   using namespace stdext;
   hash_set <int> hs1, hs2, hs3;
   int i;

   for ( i = 0 ; i < 3 ; i++ )
   {
      hs1.insert ( i );
      hs2.insert ( i * i );
      hs3.insert ( i );
   }

   if ( hs1 != hs2 )
      cout << "The hash_sets hs1 and hs2 are not equal." << endl;
   else
      cout << "The hash_sets hs1 and hs2 are equal." << endl;

   if ( hs1 != hs3 )
      cout << "The hash_sets hs1 and hs3 are not equal." << endl;
   else
      cout << "The hash_sets hs1 and hs3 are equal." << endl;
}

The hash_sets hs1 and hs2 are not equal.
The hash_sets hs1 and hs3 are equal.

Requirements

Header: <hash_set>

Namespace: stdext

See Also

Reference

Standard Template Library