Writing FreeDOS programs in C (advanced topics)

Last week, we learned about some advanced programming features in C, and I'm continuing that in this week's video. Let's learn about some operators that can help you - but use them carefully or you'll introduce some subtle and interesting bugs.

This is part of the "Writing FreeDOS programs in C" series

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[GilbertLaurel]

Thank you, I learned a lot since I followed and subscribed to your channel. If you don't mind please make a tutorial on TUI how do you make simple window or a message box with shadow effect and can restore the screen background upon exit.

[Lee_Adamson_OCF]

Howdy! Have you talked about how to write TSR programs in any of your previous videos?

[nasigoreng]

thought i had better say something, i am restoring an old xt computer atm
hoping to test free dos on it.

[kneekoo]

Quite nice explanations. I'm sure those who've never been exposed to binary won't be able to figure out the 8421, but there are plenty of sources explaining that. As for bit shifting, and basically anything else that falls under the "very useful" category, the minimum that should be added is some use case. Ok, it's useful, but what for? And why would bit shifting work like that (padding with 0's) instead of moving the bits around the other end? Or can you instruct C to bit-shift like that? I mean turning 10000101 >> 1 into 11000010. Because this would be useful as well, say for a very simple encryption that can be reversed because you don't lose bits, as opposed to the method presented in this video.

[stephen]

How can we make graphical programs in C on FreeDOS? Is there something like Turbo C?