Copying C tests to its own version of C++

[josemonsalve2]

Is your feature request related to a problem? Please describe. There are compilers that use different C and C++ passes. @mjklemm suggested we replicate all the C codes into C++ files (.cpp). I think this is a good idea, I want to discuss it with everyone else too.

Describe the solution you'd like A solution we discussed was to make a hard copy of each of the tests into its own file, and possibly make specific C to C++ changes (e.g. malloc to new).