Standard C++ Library Class Reference

// Try equal_range variants

pair<iterator,iterator> p1 =

equal_range(v1.begin(),v1.end(),3);

// p1 = (v1.begin() + 4,v1.begin() + 5)

pair<iterator,iterator> p2 =

equal_range(v1.begin(),v1.end(),2,less<int>());

// p2 = (v1.begin() + 4,v1.begin() + 5)

// Output results

cout << endl << "The equal range for 3 is: "

<< "( " << *p1.first << " , "

<< *p1.second << " ) " << endl << endl;

cout << endl << "The equal range for 2 is: "

<< "( " << *p2.first << " , "

<< *p2.second << " ) " << endl;

return 0;

}

Output :

The equal range for 3 is: ( 3 , 4 )

The equal range for 2 is: ( 2 , 3 )

Warnings

If your compiler does not support default template parameters then you need to always supply

the Allocator template argument. For instance you'll have to write:

vector<int,allocator>

instead of:

vector<int>