my_printf — Simple custom printf in C

A minimal implementation of a printf-like function in C.
Instead of using the standard library’s printf, this project provides a function named _printf that supports printing characters, strings, integers, and literal percent signs via a format string.

What it does

• Parses a format string (like "Hello %s, you are %d years old\n")
• Replaces format specifiers with provided values (string, integer, char)
• Outputs the final result character by character to standard output
• Returns the count of printed characters (just like standard printf)

This project helps to learn how formatting, variable arguments, and low-level output work under the hood in C.

Project files and their roles

File	Purpose
main.h	Declares all functions used across the project; allows all source files to share common definitions.
_printf.c	Core of the project: defines _printf(const char *format, ...). Parses the format string, detects placeholders, and directs printing tasks.
_putchar.c	Low-level helper: writes a single character to standard output. All printing operations go through this.
print_char.c	Handles the %c specifier: prints a single character argument.
print_string.c	Handles the %s specifier: prints a C-string (i.e. a char *) by outputting each character in turn.
print_int.c	Handles integer placeholders (%d / %i): converts an integer to its decimal string representation (handling negative values), then prints it.
print_percent.c	Handles %%: prints a literal %.
(optional) Documentation or manual files	Provide usage instructions or explain design decisions — not required for compilation but useful to understand how the project works.

How it works (in simple steps)

1. You write something like:

   _printf("Hello %s! You have %d new messages.\n", username, msg_count);