K&R seems to use pre-increment early on, then post-increment consistently (or a lot, anyway, I haven't done a thorough check) after chapter 3, in situations whe

K&R seems to use pre-increment early on, then post-increment consistently (or a lot, anyway, I haven't done a thorough check) after chapter 3, in situations where either would do. In fact, after introducing post-increment at 2.8.