How do I find an element position in std::vector?

Question

I need to find an element position in an std::vector to use it for referencing an element in another vector:

int find( const vector& whe         


        

Answer 1

You could use std::numeric_limits::max() for elements that was not found. It is a valid value, but it is impossible to create container with such max index. If std::vector has size equal to std::numeric_limits::max(), then maximum allowed index will be (std::numeric_limits::max()-1), since elements counted from 0.