42 Exam Rank 03 -

Historically, the revolves around two functions: get_next_line and a secondary function called ft_printf or sometimes ft_itoa (depending on your campus iteration). However, the most common and feared version is Get Next Line (GNL) combined with a simple printf clone.

if (cmpf(item, (*root)->item) < 0) ft_btree_insert_data(&(*root)->left, item, cmpf); else ft_btree_insert_data(&(*root)->right, item, cmpf);

The 42 pedagogy loves recursion. While iteration (loops) is often safer for beginners, recursion is elegant and expected for certain tasks. 42 Exam Rank 03

Unlike earlier exams that focus on basic utility functions, Rank 03 tests your ability to manage files, memory, and formatted output without the safety net of the Norminette.

The exam is split into two levels:

// Handle special cases: INT_MIN, base 10, base 16, etc. // Recursive approach: // - Convert absolute value // - Build string from least significant digit // - Handle negative for base 10

| Mistake | Consequence | Prevention | |---------|------------|------------| | Forgetting to include #include <stdlib.h> | Implicit function declaration → Moulinette fails | Write includes at top | | Memory leak in list remove_if | Fails strict test | Always free removed node | | Not handling NULL input | Segmentation fault in tests | Check if (!list) return | | Using recursion for deep lists | Stack overflow (not tested but bad style) | Use iteration for long lists | | Modifying original pointer without pointer-to-pointer | Head lost | Use t_list ** when head can change | | ft_itoa_base INT_MIN bug | Wrong output for -2147483648 | Special case: convert to unsigned | | Not checking base bounds | Undefined behavior → fails | if (base < 2 \|\| base > 16) return (NULL); | While iteration (loops) is often safer for beginners,

To pass Rank 03, you need .