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🔌Curated collection of useful C Programming tutorials, snippets, and projects that you can understand in 30 seconds or less.
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README.md

30-Seconds-of-C-Logo

30 Seconds of C

PRs WelcomeAwesomeLicense


🔌Your plug to a curated collection of useful C Programming tutorials, snippets, and projects that you can understand in 30 seconds or less.



P.S: This repository is a work in progress

Getting Started

  • Use Ctrl + F or command + F to search for a snippet.
  • Contributions welcome, please read the contribution guide.

Motivation for this project The core goal of 30 seconds of C is to provide a public record of my journey to learn c programming. It's my goal to provide a quality resource for both beginners and advanced c progammers/developers. My initial motivation for creating this repository was to use it as a tool to document my journey at the 42 Silicon Valley - an engineering and programming. The contents of this repo are designed to help you write real time C programs on your own.

Table of Contents

📃Basic Data Types

View contents

Integer

Character

  • char

Floating Point

  • float
  • Double

Enumeration Data Type

View contents

📚Derived Data Type

View contents

🎛️Void Data Type

View contents

Exam Shell

Purpose: This repo provides useful tips to understand how to achieve 100% at 42 Silicon Valley exams. A great developer like you 😎, however, should not just memorize the answers.


aff_a

Create a program that takes a string, and displays the first 'a' character it encounters in it, followed by a newline. If there are no 'a' characters in the string, the program just writes a newline. If the number of parameters is not 1, the program displays 'a' followed by a newline.

$> ./aff_a "abc" | cat -e
a$
$> ./aff_a "dubO a POIL" | cat -e
a$
$> ./aff_a "zz sent le poney" | cat -e
$
$> ./aff_a | cat -e
a$
Answer
#include <unistd.h>

int	main(int argc, char **argv)
{
	if (argc != 2)
		write(1, "a", 1);
	else
	{
		while (*argv[1])
			if (*argv[1] == 'a')
			{
				write(1, "a", 1);
				argv[1]++;
				break;
			}
	}
	write(1, "\n", 1);
	return (0);
}


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ft_countdown

Write a program that displays all digits in descending order, followed by a newline.

$> ./ft_countdown | cat -e
9876543210$
$>
Answer
#include <unistd.h>

int	main(void)
{
	char c;
	c = '9';
	while (c >= '0')
	{
		write(1, &c, 1);
		c--;
	}
	write(1, "\n", 1);
	return (0);
}


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ft_print_numbers

Write a function that displays all digits in ascending order.

Your function must be declared as follows:

void ft_print_numbers(void);

Answer
#include <unistd.h>

int	main(void)
{
	char c;

	c = '0';
	while (c <= '9')
	{
		write(1, &c,1);
		c++;
	}
	write(1, "\n", 1);
	return (0);
}


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Additional Learning Resources

If you are new to C Programming, try taking a look at some of these references.

Books


  • ANSI 89 – American National Standards Institute, American National Standard for Information Systems Programming Language C, 1989.
  • Kernighan 78 – B. W. Kernighan and D. M. Ritchie, The C Programming Language, Prentice-Hall: Englewood Cliffs, NJ, 1978. Second edition, 1988.
  • Thinking 90 – C* Programming Guide, Thinking Machines Corp. Cambridge Mass., 1990.
  • Head First C - A complete learning experience for C and structured imperative programming.

Websites


Online Integrated Development Environments (IDEs)

Inspiration for this project

The idea behind 30 Seconds of C was inspired some people who created similar collections in other programming languages and environments. Here are the ones we like the most:

How to Contribute

Do you have a cool idea for a new snippet, or want to add your own tips? Checkout contributing.md.

Collaborators


Fred Siika

Grace Nelore

Credits

Icon made by Smashicons from www.flaticon.com is licensed by CC 3.0 BY.
This site was built using GitHub Pages.


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