Ft_printf

A custom Printf implementation from 42 School

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✨ Overview

Ft_printf is an individual project at 42 School that recreates the standard C printf function from scratch. This project focuses on handling formatted output with essential specifiers and conversions, mastering variadic arguments, and ensuring robust string manipulation. It’s a key step in building foundational skills for the 42 curriculum.

The goal? Deliver a reliable, custom Printf that mirrors the core functionality of the original.

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📑 Key Features

Supported Conversions

• %c — Prints a single character.
• %s — Prints a string.
• %p — Prints a pointer address in hexadecimal.
• %d/%i — Prints a decimal integer (signed).
• %u — Prints an unsigned decimal integer.
• %x/%X — Prints a hexadecimal integer (lowercase or uppercase).
• %% — Prints a literal percent sign.

Core Files

• main.c — Main file handling format string parsing and output.
• print.c — Routes to the appropriate conversion function.
• utils.c — Contains several functions that are useful and necessary for other files.

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🛠️ Technologies Used

• C — Core programming language.
• Makefile — Build automation tool.

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🚀 How to Build and Run

1. Clone repository

   git clone git@github.com:doooriian/Ft_printf.git

2. Go inside project directory and run make

   cd Ft_printf
   make

3. To use the library in your code, #include the following header

   #include "printf.h"

🧪 Testing

This project was tested using Francinette, a widely-used third-party tester designed for 42 School projects, along with custom test cases to ensure compliance with the printf standard.

✅ Results

Here’s my score for the Ft_printf project:

📬 Contact

Feel free to reach out or contribute to this project via GitHub!