Lab 1 check

Run the focused RTC test first. It is faster than launching an example and gives a direct signal about the helper contracts. Then run the headless example with a fixed virtual RTC time so output is deterministic.

lcom-ng test rtc
lcom-ng run --headless --rtc 2026-06-16T12:34:56 -- build/examples/rtc_date

Discussion prompts

• Why does rtc_read_date receive a pointer instead of returning a struct?
• What goes wrong if the date changes between reading day, month, and year?
• Which helpers belong in labs/rtc/ rather than a reusable lib/rtc/ module?

External reading

The LCOM bitwise chapter and RTC chapter are useful companions. For C details, review the GNU C notes on bitwise operations, shift operations, and variadic functions. For the operating-system view, read the OSDev CMOS overview.