Comment by pjmlp

Kudos for going with modern C practices.

There is a place to learn about history of computing, and that is where K&R C book belongs to.

Not only is the old way, this is from the age of dumb C compilers, not taking advantage of all stuff recent standards allow compiler writers to take to next level on optimizations, not always with expected results.

Maybe getting students to understand the ISO C draft is also an interesting exercise.