Welcome to the Piscine. Exam 01 is waiting.
You cannot use <stdio.h> (no printf for debugging in the final submission – though you can use it during development if you comment it out!). You cannot use <string.h> . You must rewrite strlen , strcpy , etc., by hand. c piscine exam 01
Convert a string (in a given numeric base, e.g., binary, hex) into an integer. This requires handling +/- signs, whitespace, and invalid characters. It is the ultimate test of string traversal. Welcome to the Piscine