How to convert vector iterator to int in C++

Question

I am looking for an element in a C++ vector, and when I find it, I want to get found element\'s index in a numerical form(integer, float).

My naive attempt is this :

Answer 1

You need to use standard function std::distance

index = std::distance( myvector.begin(), it );

if ( index < myvector.size() )
{
    // do something with the vector element with that index
}

Try always to use std::distance even with random access iterators. This function is available in the new and old C++ Standards.