https://github.com/fredsiika/30-seconds-of-c
🔌Curated collection of useful C Programming tutorials, snippets, and projects that you can understand in 30 seconds or less.
https://github.com/fredsiika/30-seconds-of-c
c c-code c-language c-languages c-programming c-programming-game c-programms c-project
Last synced: 3 months ago
JSON representation
🔌Curated collection of useful C Programming tutorials, snippets, and projects that you can understand in 30 seconds or less.
- Host: GitHub
- URL: https://github.com/fredsiika/30-seconds-of-c
- Owner: fredsiika
- License: gpl-3.0
- Created: 2018-08-28T09:03:48.000Z (almost 7 years ago)
- Default Branch: master
- Last Pushed: 2019-12-20T10:44:06.000Z (over 5 years ago)
- Last Synced: 2025-03-24T03:12:14.669Z (3 months ago)
- Topics: c, c-code, c-language, c-languages, c-programming, c-programming-game, c-programms, c-project
- Language: JavaScript
- Homepage: https://fredsiika.github.io/30-seconds-of-c/
- Size: 358 KB
- Stars: 37
- Watchers: 4
- Forks: 10
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
Awesome Lists containing this project
README
# 30 Seconds of C
[](http://makeapullrequest.com)
🔌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](./CONTRIBUTING.md).
**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](https://www.42.us.org/) - 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](https://github.com/fredsiika/30-seconds-of-c/edit/master/README.md#table-of-contents)
### 📃[Basic Data Types](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/c-data-types.md)
View contents
**Integer**
- [int](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/integer-data-type.md)
**Character**
- char
**[Floating Point](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/floating-point-data-type.md)**
- float
- Double
### ➗[Enumeration Data Type](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/enumeration-data-type.md)
View contents
- [enum](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/enumeration-data-type.md)
### 📚[Derived Data Type](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/derived-data-type.md)
View contents
- [pointer](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/pointers.md)
- [array](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/array.md)
- structure
- union
### 🎛️[Void Data Type](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/void-data-type.md)
View contents
- [void](https://github.com/fredsiika/30-seconds-of-c/blob/master/glossary/void-data-type.md)
---
## [Exam Shell](https://github.com/fredsiika/30-seconds-of-c/tree/master/examshell)
**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](https://github.com/fredsiika/30-seconds-of-c/blob/master/examshell/00-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.
```c
$> ./aff_a "abc" | cat -e
a$
$> ./aff_a "dubO a POIL" | cat -e
a$
$> ./aff_a "zz sent le poney" | cat -e
$
$> ./aff_a | cat -e
a$
```
Answer
```c
#include
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);
}
```
[⬆ Back to top](#table-of-contents)
### [ft_countdown](https://github.com/fredsiika/30-seconds-of-c/tree/master/examshell/00-ft_countdown)
Write a program that displays all digits in descending order, followed by a
newline.
```c
$> ./ft_countdown | cat -e
9876543210$
$>
```
Answer
```c
#include
int main(void)
{
char c;
c = '9';
while (c >= '0')
{
write(1, &c, 1);
c--;
}
write(1, "\n", 1);
return (0);
}
```
[⬆ Back to top](#table-of-contents)
### [ft_print_numbers](https://github.com/fredsiika/30-seconds-of-c/tree/master/examshell/00-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
```c
#include
int main(void)
{
char c;
c = '0';
while (c <= '9')
{
write(1, &c,1);
c++;
}
write(1, "\n", 1);
return (0);
}
```
[⬆ Back to top](#table-of-contents)
### 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.](http://www.allitebooks.com/head-first-c/)
#### Websites
---
- [GeeksforGeeks - A computer science portal for geeks.](https://www.geeksforgeeks.org/c-programming-language/)
- [SoloLearn - C Tutorial](https://www.sololearn.com/Course/C/)
- [C Programming Google+ Community](https://plus.google.com/u/0/communities/103796658293092790651)
#### Online Integrated Development Environments (IDEs)
- [C Tutor - Visualize C code execution to learn C online](http://www.pythontutor.com/c.html#mode=edit)
- [Ideone - An nline compiler and debugging tool](https://ideone.com/)
- [SoloLearn - Code Playground](https://code.sololearn.com/#c)
## 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:
- [30 Seconds of Code](https://github.com/Chalarangelo/30-seconds-of-code) by **charlarangelo**
- [30 Seconds of CSS](https://atomiks.github.io/30-seconds-of-css) by **atomiks**
- [30 Seconds of Python](https://github.com/kriadmin/30-seconds-of-python-code) by **kriadmin**
- [30 Seconds of Interviews](https://30secondsofinterviews.org) by **fejes713**
## How to Contribute
Do you have a cool idea for a new snippet, or want to add your own tips? Checkout [contributing.md](./CONTRIBUTING.md).
## Collaborators
[
](https://github.com/fredsiika)
[Fred Siika](https://github.com/fredsiika)
[
](https://github.com/gracenellore)
[Grace Nelore](https://github.com/gracenellore)
## Credits
*Icon made by [Smashicons](https://www.flaticon.com/authors/smashicons) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).*
This site was built using [GitHub Pages](https://pages.github.com/).
[⬆ Back to top](#table-of-contents)