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
);
Parameters
_Left
An object of type multiset._Right
An object of type multiset.
Return Value
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.
Remarks
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.
Example
// 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.
Requirements
Header: <set>
Namespace: std