Day 030: Bridges in No Man's Land
What happens when the compiler guesses wrong and the CPU doesn't know it.
K&R
Day 29: The Architect's Leap
K&R 4.1 — what happens when the compiler builds a bridge without a blueprint.
Day 27: The Ghost in the Register
K&R 3.7 and 3.8. break, continue, and the one place K&R says goto is okay.
Day 026: The Negative Domain
Day 006 The Shortcut Tax
Line counting, state tracking, and the cost of reaching for someone else's answer.
Day 005 The Program Listens
C stops printing and starts listening. getchar, putchar, and the precedence trap that has ruined code for fifty years.
Day 004 What They Didn't Know
K&R section 1.4. Symbolic constants. The preprocessor. And the realization that every layer was built by people who could not see what was coming.