C POOL — DAY 03

Writing your very first lines of C, with a single function allowed.

This is the day you actually program. The constraint is radical: the only output function allowed is the one that writes a single character to the screen. Everything else — printing a word, a number, a combination — has to be rebuilt by hand. Frustrating at first, and extremely formative: you come to understand what really sits underneath every function you will use later.

C exercises delivered file by file: loops, conditionals, arithmetic and combination generation, with my_putchar as the only output primitive.