C POOL — DAY 04

Pointer day — the concept that sets C apart from every other language.

This is reputedly the hardest day of the early pool: the one where you manipulate memory addresses directly. Understanding that a variable has a value but also a location, and that you can hand that location to a function so it modifies the original, completely changes how you write code. Many people drop off here; it is also where everything falls into place once it finally clicks.

Implementing my_swap, my_strlen, my_putstr, my_getnbr and an integer array sort, manipulating addresses and dereferences explicitly.