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Quotation-Aristotle-Be-a-free-thinker-and-don-t-accept-everything-you-139-75-05

Ft_printf

This is the second project of the 42Cursus.
The goal of this project is pretty straightforward. recoding printf() (not the whole function).

Note: I haven't shared the PDF of this project, as well as, I haven't explained anything due to school privacy reasons!

This project consists of two parts:

  • Mandatory part
  • Bonus Part

Note: The Bonus Part is not that necessary to validate the project, but it gives some extra XPs and days for the The Blackhole.

Project Structure

|____.gitignore
|____includes
| |____ft_printf.h
|____Makefile
|____README.md
|____sources
| |____ft_printf.c
| |____ft_printhex.c
| |____ft_putchar.c
| |____ft_putsigned.c
| |____ft_putstr.c
| |____ft_putunsigned.c

Mandatory Part

To implement your own printf() you need to go over each one of these string formats:

  • %c Prints a single character.
  • %s Prints a string (as defined by the common C convention).
  • %p The void * pointer argument has to be printed in hexadecimal format.
  • %d Prints a decimal (base 10) number.
  • %i Prints an integer in base 10.
  • %u Prints an unsigned decimal (base 10) number.
  • %x Prints a number in hexadecimal (base 16) lowercase format.
  • %X Prints a number in hexadecimal (base 16) uppercase format. •-%% Prints a percent sign.

What are variadic functions

To have this project done you must learn a new C Concept which is Variadic Functions.

in C Programming Language function takes a known number of params to deal with, but what if we want to pass an unknown number of params and let the function handle all of them? it's cool right :)?

with Variadic Functions this problem would be fixed.

Here is how to declare a Variadic Function that takes a variable number of params:

void variadic_function(char *s, ...)

let's break this example down so we can see what this weird function does.

first of all, this function returns nothing, the first parameter is a string but the second one ... is something to declare to the function that we are about to accept a variable number of params.

learn more about Variadic Functions via Variadic Functions in c

Things you will learn in this project

Variadic Functions

Number System Conversion

Implementation of your own printf() function

Makefile

How to use printf() properly

Pointers

Contact Me