Well, I'm stumped. I can think of some other "cosmetic" issues and some things you fail to test (e.g. that the function is in-place, runs in O(strlen(z_terminat

Well, I'm stumped. I can think of some other "cosmetic" issues and some things you fail to test (e.g. that the function is in-place, runs in O(strlen(z_terminated)) and does not access memory beyond z_terminated[strlen(z_terminated)]), but that's it. Besides, as you mention, such issues can usually be found just by looking at the function. Will you give out the answer at some point?