Goal

This small problem popped up on my newsfeed, from an interview process and thought I would take a shot at it with a few different languages. Will add other languages depending on my bandwith.

Problem

Write a program in C++ that takes in a file as input and reverses every line and puts it in a different file. Try to do this with as little memory footprint as possible and as fast as possible.

Solution Approaches

C++

In the spirit of the original requirement, keeping it all in the same file.