ft_printf

This is a custom implementation of the C standard library function printf

Features

If you've written C code before, you're likely already familiar with printf. In this project, the core functionality of printf was reimplemented without relying on the standard library. The goal wasn’t to cover all of its features, but rather to support a subset of the most commonly used format specifiers:

• %c – Print a single character
• %s – Print a string
• %p – Print a pointer (in hexadecimal format)
• %d – Print a signed decimal integer
• %i – Print a signed decimal integer (alias for %d)
• %u – Print an unsigned decimal integer
• %x – Print a number in hexadecimal (lowercase)
• %X – Print a number in hexadecimal (uppercase)
• %% – Print a literal % character

Build Instructions

To compile and use ft_printf in C programs:

1. Clone the repository:

git clone https://github.com/hlntzg/ft_printf.git
cd ft_printf

2. Build the library:

make

This will generate libftprintf.a, which you can link to your programs.

3. Compile with your own file:

gcc main.c libftprintf.a -I. -o my_printf

Project structure

ft_printf/
├── ft_printf.c               # Main implementation of ft_printf
├── ft_printf.h               # Header file with function prototypes and includes
├── ft_printf_char.c          # Handles %c conversion (characters)
├── ft_printf_hexadecimal.c   # Handles %x and %X conversions (hexadecimal)
├── ft_printf_int.c           # Handles %d and %i conversions (signed integers)
├── ft_printf_pointer.c       # Handles %p conversion (pointers)
├── ft_printf_string.c        # Handles %s conversion (strings)
├── ft_printf_unsigned_int.c  # Handles %u conversion (unsigned integers)
├── Makefile                  # Build script for compiling the project
├── README.md                 # This documentation file
└── libft/                    # Custom libft library used as a dependency

License

This project is licensed under a custom Educational Use License. It is intended for personal and academic use within Hive Helsinki and the 42 Network. See LICENSE for full terms.