ft_printf

Reimplementation of the C standard library printf function from scratch, as part of the 42 curriculum.

Description

ft_printf replicates the behavior of printf with support for multiple format specifiers. The project focuses on variadic functions, format string parsing, and memory-efficient character output.

Supported Format Specifiers

Specifier	Description
%c	Single character
%s	String
%d / %i	Signed decimal integer
%u	Unsigned decimal integer
%x / %X	Hexadecimal (lower / upper)
%p	Pointer address
%%	Literal %

Stack

• Language: C
• Key concepts: variadic functions (va_list, stdarg.h), format string parsing, low-level output via write(2)

How It Works

ft_printf(format, ...)
  → scan format string character by character
  → on '%': identify specifier → convert argument → write output
  → return total number of characters written

42 Project Info

Field	Value
Project	ft_printf
Circle	1
Norminette	Compliant

What I Learned

• How variadic functions work in C (stdarg.h)
• Modular dispatch: one entry point routing to type-specific conversion functions
• Low-level output management with write and byte counting