It's a qbasic-like interpreter written in C, the source (downloadable) really looks like C. It requires wxwidgets, this may be the reason of failure. It was also written in the times when wxwidgets was called wxwindows, and may be incompatible with the new version.
It can't find wxwidget include files, provide the compiler with them (set up include path so that it know where to search). There is also bison source file you have to take care about.
If you use the <>, the header file must be in a folder along a predefined path. Here you need to see how your development tool lets you specify additional preprocessor include directories. I know how to do this using Visual C++.
If you use the " " format, then the header must be in the same folder as the file you are compiling. If not, the preprocessor reverts to the <> format and looks along the predefined paths.
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