Position of a multiset lower_bound iterator

Question

Assume, I have a multiset A = {0, 1, 1, 1, 2}. If a do the following operation:

multiset<int>::iterator it = A.lower_bound(2)

It returns a iterator. I can easily print its value. But is there any way to know its position? i mean it will return 4.

Answer 1

Use std::distance

#include <iterator>
#include <set>

int main() 
{
    multiset<int> A = { 0, 1, 1, 1, 2 };
    multiset<int>::iterator it = A.lower_bound( 2 );
    size_t dist = distance( A.begin(), it );
}