ft_printf

Description

ft_printf is a custom implementation of the standard C printf function. It formats and prints output to the standard output (stdout). The project aims to enhance understanding of variadic functions, formatted output, and low-level data handling.

Features

• Supports the following format specifiers:
  • %c : Prints a single character.
  • %s : Prints a string.
  • %d / %i : Prints a signed integer.
  • %u : Prints an unsigned integer.
  • %x / %X : Prints a hexadecimal number (lowercase/uppercase).
  • %p : Prints a pointer address.
  • %% : Prints a percent sign.
• Handles field width, precision, and some flags like - (left alignment) and 0 (zero padding).
• Uses variadic arguments (va_list, va_start, va_arg, va_end).

Usage

To use ft_printf, compile it into your project and include the header file:

#include "ft_printf.h"

int main()
{
    ft_printf("Hello, %s! You have %d new messages.\n", "Isaiah", 5);
    return 0;
}

Compilation

Compile:

make all

Clean:

make fclean

Allowed Functions

• write
• malloc
• free
• va_start, va_arg, va_copy, va_end

Project Constraints

• Must not use standard library functions like printf, sprintf, or snprintf.
• Functions should be properly modularized and memory-efficient.
• Edge cases and error handling should be considered.

Testing

Run various test cases to ensure correct behavior:

ft_printf("Character: %c\n", 'A');
ft_printf("String: %s\n", "Hello, world!");
ft_printf("Integer: %d\n", 42);
ft_printf("Hex: %x\n", 255);