[c++] .c vs .cc vs. .cpp vs .hpp vs .h vs .cxx

Generally, .c and .h files are for C or C-compatible code, everything else is C++.

Many folks prefer to use a consistent pairing for C++ files: .cpp with .hpp, .cxx with .hxx, .cc with .hh, etc. My personal preference is for .cpp and .hpp.

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Examples related to naming

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