Welcome to the C course for beginners and advanced programmers ! This course is going to be as complete as possible, with tutorials, some exercises and a long trip to explore the C standard library.
If you want to give any review or ask for things to be added to this course, don't hesitate to post a comment under the posts of this course.
Discover your new best friend
The C programming language was created in the 1970s by Dennis Ritchie.
It's the successor of the B language. Got it ? We walked through the Latin alphabet letters until we finally made a good language for everyone. Then, derived languages born like C++.
Does the D language exist ?
Yes it exists. It got the 28th rank on the TIOBE Index on July 2022, when C got the 2nd rank. It's not common to use D. If you want to learn a more advanced language than C but with a very similar syntax, start to learn C++.
C has influenced and is still influencing a lot of programming languages (PHP, Perl, Objective-C, Java, and more...)
It uses an imperative paradigm, but can be multi-paradigm.
Hello World !
This example shows how to make your first "Hello World" with the C language :
#include <stdio.h>
int main(void) {
printf("Hello world!\n");
return 0;
}
What ??? But, how to make it working ?
Here we are. You have to install a compiler to transform the C code into a binary file that could be executed on your system. In this tutorial, we will use the GNU C Compiler (GCC) 1 but it exists other C compilers like Clang.
Compiler installation
As stated above, we use "gcc" for this tutorial.
Try to see if it's already on your computer by typing gcc -v in your terminal command line.
We also have to install the "make" software that will be discovered in another post of this course.
- Ubuntu :
sudo apt update && sudo apt install build-essential - Fedora :
sudo dnf install gcc make - Arch :
sudo pacman -S gcc make
We will run our "Hello world" script in the next post.
Common confusions
"C" should not be confused with "C#" or "C++".
You may have seen the notation "C/C++" somewhere on the Internet. But this is a misuse that confuses the two languages into one thing.
Actually, C++ is derived from the C language, but today C++ is very different from C. Just because you know C doesn't mean you are a C++ programmer and vice versa.
- I wrote that "GCC" was standing for "GNU C Compiler" to make the name easily understandable. But today it's called "GNU Compiler Collection" because it includes other languages, it's not only a C compiler.