[rajeevk]

If you want to understand the C++ in terms of C code then probably you would need to understand the C++ object model. I mean, how C++ classes are translated into C equivalent code. If you are interested in these you can take a look at a tutorial I wrote long back https://www.avabodh.com/cxxin/cxx.html

If you want to write bare metal C++ then this page from the above tutorial will be useful https://www.avabodh.com/cxxin/nostdlib.html