ft_printf - A Custom Printf Implementation

This project is part of the 42 curriculum where we recreate the famous printf function from the C standard library. The implementation handles various format specifiers and returns the number of characters printed.

Key Features

• Handles the following format specifiers:
  • %c - Single character
  • %s - String
  • %p - Pointer address
  • %d and %i - Decimal integers
  • %u - Unsigned decimal integer
  • %x and %X - Hexadecimal number (lowercase/uppercase)
  • %% - Percent sign

What I Learned

• Variadic functions in C and how to handle variable arguments
• Deep understanding of string formatting and type conversion
• Memory management and buffer handling for output operations
• Implementation of modular code design in C

How to Use

Compilation

make        # Compiles the library
make clean  # Removes object files
make fclean # Removes object files and the library
make re     # Rebuilds the library

Integration

#include "ft_printf.h"

int main(void)
{
    ft_printf("Hello %s! Number: %d\n", "World", 42);
    return (0);
}

Compilation with Your Program

cc -Wall -Wextra -Werror your_program.c libftprintf.a

Example Usage

ft_printf("Character: %c\n", 'A');          // Output: Character: A
ft_printf("String: %s\n", "Hello");         // Output: String: Hello
ft_printf("Pointer: %p\n", ptr);            // Output: Pointer: 0x7fff5fbff81c
ft_printf("Integer: %d\n", 42);             // Output: Integer: 42
ft_printf("Unsigned: %u\n", 42);            // Output: Unsigned: 42
ft_printf("Hexadecimal: %x\n", 42);         // Output: Hexadecimal: 2a
ft_printf("HEXADECIMAL: %X\n", 42);         // Output: HEXADECIMAL: 2A

Author

• Ayham Abu Snina (@aabusnin)

License

This project is part of the 42 School curriculum.