The comparison between multiset objects is based on a pairwise comparison of their elements. The greater than or equal to relationship between two objects is based on a comparison of the first pair of unequal elements.

// multiset_op_ge.cpp
// compile with: /EHsc
#include <set>
#include <iostream>
int main( )
{
using namespace std;
multiset <int> s1, s2, s3, s4;
int i;
for ( i = 0 ; i < 3 ; i++ )
{
s1.insert ( i );
s2.insert ( i * i );
s3.insert ( i - 1 );
s4.insert ( i );
}
if ( s1 >= s2 )
cout << "The multiset s1 is greater than "
<< "or equal to the multiset s2." << endl;
else
cout << "The multiset s1 is less than "
<< "the multiset s2." << endl;
if ( s1 >= s3 )
cout << "The multiset s1 is greater than "
<< "or equal to the multiset s3." << endl;
else
cout << "The multiset s1 is less than "
<< "the multiset s3." << endl;
if ( s1 >= s4 )
cout << "The multiset s1 is greater than "
<< "or equal to the multiset s4." << endl;
else
cout << "The multiset s1 is less than "
<< "the multiset s4." << endl;
}

The multiset s1 is less than the multiset s2.
The multiset s1 is greater than or equal to the multiset s3.
The multiset s1 is greater than or equal to the multiset s4.