Custom printf()

This project implements a custom version of the C standard library function printf. The custom printf function provides formatted output to the standard output, supporting a subset of the standard format specifiers.

Features

• Handles common format specifiers such as %c, %s, %d, %i, %u, %x, %X, and %%.
• Supports variable argument lists.
• Designed for educational purposes to demonstrate how formatted output functions work internally.

Usage

1. Compile the code:

   gcc -Wall -Wextra -Werror -pedantic *.c -o my_printf

2. Include the header in your C files:

   #include "main.h"

3. Call the custom printf function:

   _printf("Hello, %s! Number: %d\n", "world", 42);

Files

• main.h — Header file with function prototypes.
• _printf.c — Main implementation of the custom printf function.
• utils.c — Helper functions for formatting and output.
• man_3_printf — Manual page for usage instructions.

Example

_printf("Character: %c, String: %s, Decimal: %d\n", 'A', "test", 123);

Limitations

• Supports basic format specifiers: %c (character), %s (string), %d and %i (integers)
• Buffer size limited to 1024 characters
• Does not support field width or precision modifiers
• No support for length modifiers (l, h, ll, etc.)
• Cannot handle floating-point numbers (%f, %e, %g)
• Special characters like \t, \n must be passed directly

Author

• Michael

License