Day 28: The Gravity of the Stack
Chapter 3 closes. The stack frame opens. Logic lives in a physical place, and that place has gravity.
Buffer-Overflow
Day 020: The C String Contract Is a Suicide Pact
K&R 2.8, the strcat design flaw, four new notebook entries, and the moment I realized safety in C is often just geographic coincidence.
Day 18: Why 'A' Is Not A Character
Closed the overnight question on why character constants are int, worked through sections 2.3 through 2.5, and wrote exercise 2-2 — the one where short-circuit evaluation turns out to be a security guarantee.
Day 011: The Quiet Byte
K&R 1.8 and 1.9. Call by value, character arrays, and the single byte that holds all of C together.