ft_printf

A versatile and customizable formatted output function.

📖 Description

The ft_printf project reimplements the standard C printf function.

The goal is to create a function capable of formatting and printing different types of data, supporting multiple conversion specifiers, flags, and modifiers. This project deepens the understanding of variadic functions, parsing, and formatted output.

🛠️ Features

Function Prototype

int ft_printf(const char *, ...);

✅ Supported Conversion Specifiers

• %c – Character
• %s – String
• %p – Pointer address
• %d / %i – Signed integers
• %u – Unsigned integer
• %x / %X – Hexadecimal (lowercase/uppercase)
• %% – Percent sign

⚙️ Supported Flags

• - (left align)
• 0 (zero padding)
• . (precision)
• # (alternate form for hex)
• + (force sign)
• space (prepend a space for positive numbers)

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📦 Installation

Clone the repository and compile the library:

git clone https://github.com/hanmpark/ft_printf.git
cd ft_printf
make

This will create libftprintf.a which you can link into your projects.

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🚀 Usage

Example usage:

#include "ft_printf.h"

int main(void)
{
    int count;

    count = ft_printf("Hello %s! Number: %d, Hex: %x\n", "world", 42, 42);
    ft_printf("Printed %d characters.\n", count);
    return (0);
}

Compile with:

gcc main.c -L. -lftprintf -I. -o my_program

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👤 Authors

• hanmpark