Here is a new application i made in C with the SDL 1.2.
this is just the front screen for the interface of my internal software at work.
the front screen is just a few button to select option and a char field to enter the customer phone number, and of course a submit button.
here is a print screen, the source code will be available soon on my Git hub.
i had the idea to create a GUI in DOS-like gui, it might be not that nice but that could be a good template to improve it.