Your Second Day in C (Understand .h header and .c source files) - Crash Course in C Programming

►Lesson Description: In this series of lessons I provide you with a crash course in the C programming language. In this lesson I will show you the difference between a .h file, and a .c file. This will lead us into a small discussion and demonstration of how to structure a C project. We'll also be reviewing several of the topics from the first video in the playlist linked above.

00:00 Introduction
00:40 Discussion of header versus implementation files
3:40 Creating a main.c file.
4:00 The vector struct that we are creating.
5:20 The header and implementation for our math library
7:00 Sketching a vector 'Add' function.
8:45 Including files is a copy and paste by the preprocessor
10:20 Header Guards discussion and usage
11:40 Implementing the functions in our header file in our .c file.
12:40 Refactoring our 'Add' Function
15:00 const parameters
15:57 Using our Math Library
17:00 Different ways to include files
20:25 Successfully running our program.
20:53 Review of what we have done.
24:14 Review of compiling multiple files in C
26:00 Conclusion and wrap up

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[werhanihoussemeddine]

That is a very good video. I enjoy watching it, but I have a couple of questions. Firstly, I do not understand why he refactored the Add function. Instead of getting two values and returning a value, he changed it to return nothing and passed two references. The result will be the value of the first variable (out). It seems like not a good practice. Lastly, why doesn't he simply pass a value for the variable (in) instead of passing a reference if he is not changing its values?

[joaocesarlima]

You're now my number one source for learning C/C++ on YouTube! Please keep it up!

[viktorkomarov]

This is some sort of perfection: the quality of video, the theme you uncover, screen management, sound and explanation. You're criminally underrated teacher and video maker.

[chriskiesel]

The world needs more people like Mike. That’s all I can say, you made it look so easy and smooth…. Thank you so much ❤

[kevinnudel]

I found your channel while searching for this video, got me do your crash course course.

[dhanushs]

Very Happy I found you on youtube. You are a wonderful teacher. Thank you.

[abdodaood]

You are not the only programmer whose lessons I follow but you are the best at all 💯, go ahead.

[slavapavlov]

Hey Mike, thank you for the video!

To recap.
Let's say, we have our custom functions declared in custom.h

We *#include** "custom.h"* both
in custom.c (our functions are actually implemented here) and
in main.c (our functions are used here).

We don't compile .h files. Only .c files.
For instance, *gcc main.c custom.c*
The compiler glues them together and gives us one executable.

Also, remember about so-called header guards in .h files.

And be careful about data types we're passing into our functions.
To be frank, I got the gist of it but to feel more comfortable with this topic I'll be looking for more examples in my C programming journey.

[sallaklamhayyen]

as always brilliant explanation thank you Mike

[aghiadalzein]

This course is the best way to learn C, thanks for the great effort .Will you add more videos in the future??

[akash-tjru]

Pls make a video on
"multiple line Macros" in C. Thanks for such nice explanation...very informative and point to point explanation.

[jimstorch]

Really enjoying the series Mike. Just curious, did you mean to use 'vector_h' or 'vector_t' as the typedef?

[hounangogogo]

Hey Mike, thank you for providing this amazing courses. Do you plan to publish this C course, and Computer System course to Udyme?

Thanks

[rudolfbouzek]

hi, its a good series. no offend, but i expect indian accent... nice suprise :D

[tristan]

Hello, great video. I didnt really understand whats the problem with the function having a return type. Why did you use the pointers instead?