ft_printf

ft_printf is a project from 42 school that consists of recreating the standard printf function in C. The objective is to develop a custom version of this function that reproduces the main features of printf and provides a deeper understanding of variadic arguments, memory management, and formatting in C.

Table of Contents

1. Overview
2. Features
3. Installation
4. Usage
5. Implemented Format Options
6. Author

Overview

The ft_printf project aims to recreate a printf-like function that can handle basic formats and common data types. This project is an opportunity to gain a deeper understanding of string manipulation, memory management, and the use of variadic macros in C.

Features

• Handling of simple formats such as %c, %s, %p, %d, %i, %u, %x, and %X.
• Support for variadic arguments.
• Basic formatting options, including width and precision specifiers.

Installation

To use ft_printf, start by cloning the repository and compiling the library.

git clone https://github.com/garcia2/42_ft_printf
cd 42_ft_printf
make

This will generate a libftprintf.a file that you can link with other programs to use ft_printf.

Usage

To use ft_printf, simply include the ft_printf.h header in your code and link the library during compilation.

Example:

#include "ft_printf.h"

int main(void) {
    int len;

    len = ft_printf("Hello, %s! The answer is %d.
", "world", 42);
    ft_printf("The printed string is %d characters long.
", len);

    return 0;
}

Compilation:

gcc -Wall -Wextra -Werror main.c -L. -lftprintf -o my_program

Implemented Format Options

• %c : Single character
• %s : String of characters
• %p : Pointer in hexadecimal format
• %d and %i : Signed integer in base 10
• %u : Unsigned integer in base 10
• %x and %X : Unsigned integer in base 16 (lowercase and uppercase)

Author

Project developed by Nicolas Garcia as part of 42 school.