https://github.com/amaitou/ft_printf

Recoding of the c standard function printf()
https://github.com/amaitou/ft_printf

1337school 42cursus 42network printf-42 variadic-functions

Last synced: 8 days ago
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Recoding of the c standard function printf()

• Host: GitHub
• URL: https://github.com/amaitou/ft_printf
• Owner: amaitou
• Created: 2022-10-16T13:05:32.000Z (about 2 years ago)
• Default Branch: master
• Last Pushed: 2024-01-31T02:43:19.000Z (10 months ago)
• Last Synced: 2024-01-31T03:46:03.820Z (10 months ago)
• Topics: 1337school, 42cursus, 42network, printf-42, variadic-functions
• Language: C
• Homepage:
• Size: 25.4 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        

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![Quotation-Aristotle-Be-a-free-thinker-and-don-t-accept-everything-you-139-75-05](https://user-images.githubusercontent.com/49293816/210186768-6aa77841-e766-4296-b995-7124b7861d36.jpeg)

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# 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`**.

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# 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

```

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# 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.

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# 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:

```c

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`](https://www.geeksforgeeks.org/variadic-functions-in-c/#:~:text=Variadic%20functions%20are%20functions%20that,of%20arguments%20can%20be%20passed.)

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# 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

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## Contact Me

* [Twitter][_1]

[_1]: https://twitter.com/amait0u