ft_printf - A Simplified printf Implementation

ft_printf is a project from the 42 São Paulo Common Core curriculum. It recreates a simplified version of the C standard library’s printf() function, leveraging variadic arguments to handle diverse format specifiers.

About 42

42 São Paulo is a tuition-free, global coding school focused on peer-to-peer learning and project-based education. This project enhances C programming skills by implementing a versatile, extensible function.

Project Overview

ft_printf delivers a library (libftprintf.a) containing the ft_printf() function, which mimics the original printf(). It’s split into two parts:

• Mandatory Part: Handles basic conversions (cspdiuxX%).
• Bonus Part: Adds support for additional formatting flags.

Key Features

• Supports specifiers: %c (char), %s (string), %p (pointer), %d (decimal), %i (integer), %u (unsigned), %x/%X (hex lowercase/uppercase), %% (percent).
• Uses variadic arguments for flexible input handling.
• Bonus includes:
  • Management of flags #, +, and space (implemented).
  • Management of flags -0. with minimum field width (not implemented).
• Produces output identical to the standard printf() for supported features.

Restrictions

• Written in C, compliant with the 42 Norm.
• No unexpected crashes (e.g., segmentation faults).
• No memory leaks from heap allocations.
• Compiled with -Wall -Wextra -Werror.
• No buffer management from the original printf().

Getting Started

Prerequisites

• C compiler (e.g., clang).
• make utility.

How to Build and Run

1. Clone the repository:

   git clone https://github.com/LuizGandra/ft-printf-42.git
   cd ft-printf-42
   

2. Build the mandatory part:

   make
   

3. Build the bonus part (optional):

   make bonus
   

4. Link the library to a C project:

   clang -o program program.c -L<libftprintf.a directory> -lftprintf
   

Additional commands

• make clean: remove object files.
• make fclean: remove the program and object files.
• make re: rebuild everything.

Project Structure

• ft_printf.h: header with function prototype.
• ft_printf.c: core logic for ft_printf().
• ft_putaddress.c: logic for printing pointers.
• ft_putchar.c: logic for printing characters.
• ft_puthex.c: logic for hexadecimal output.
• ft_putnbr.c: logic for integers (signed/unsigned).
• ft_putstr.c: logic for strings.
• utils.c: auxiliary functions.
• Bonus files (e.g., ft_printf_bonus.c): additional flag support.
• Makefile: compilation automation.

License

This project is part of the 42 curriculum and intended for educational use.