ft_printf

ft_printf is a custom implementation of the C printf function. It builds a reusable static library while practicing variadic arguments, format-string parsing, numeric conversion, and exact return-value accounting.

Supported conversions

%c   character
%s   string
%p   pointer address
%d   signed decimal
%i   signed integer
%u   unsigned decimal
%x   lowercase hexadecimal
%X   uppercase hexadecimal
%%   literal percent

Build

make

This produces:

libftprintf.a

Use in another project

cc main.c libftprintf.a

Include:

#include "ft_printf.h"

Repository structure

ft_printf.c       Main dispatcher
ft_flags.c        Format parsing
ft_count.c        Output length accounting
ft_putchar.c      Character output
ft_putstr.c       String output
ft_putnbr.c       Signed integer output
ft_putunsigned.c  Unsigned integer output
ft_puthexa.c      Hexadecimal output
ft_putaddress.c   Pointer output

Technical highlights

• Uses stdarg.h to process variadic arguments
• Splits conversions into focused helper files
• Tracks the number of printed characters like the real printf
• Builds a static archive for reuse

Useful commands

make clean
make fclean
make re

Skills demonstrated

• Variadic functions
• Format parsing
• Base conversion
• Library creation
• C API compatibility thinking