Nwb: It seems I had originally misread your post, so that's why I didn't answer your question earlier.
Printing custom characters to the console is out of the question. The best you can hope for is to install a custom font, but Windows has lousy support for this.
If we had to use GUI itself, what would be the simplest GUI library to use? |
Unless there's a good reason to do it, I would not recommend doing this in C++.
Nowadays my go-to framework for simple GUI programs is C# with WinForms.
Could the GUI support any kind of characters? |
You can draw arbitrary pixels in a window, so you can draw any image you want, characters included.
PS: When I say "simple GUI program" I'm referring to a program whose most of its complexity is in its interaction with the user, I don't mean that the GUI itself is simple. For example, accounting systems are quite complicated, but in the end all they do is use a database and display information to the user. They don't usually need to anything particularly complicated, such as execute parallel programs in the GPU, or process network traffic in high volume (>= 10 Gbps).