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C++ is a multiparadigm language, all of the styles you mention are extreme bastardisations of the style laid out in books like Accelerated C++, Effective C++, Exceptional C++. Modern C++ Design and so on.

That style tends to be similar to that used in the STL with some OOP thrown in - when suitable. It is about selecting the abstraction that is appropriately ensuring the code is abides by RAII.

I am convinced that the Javaish/Qt way of coding is destructive for C++ as inheritance is not as simple as the generic programming style once you get to grips with it and has a lot of gotchas. And the C - style is to me just plain wrong, especially if you are using any of the C++ standard library as they are privy to throw and without reliance on RAII your code will not be exception safe, if you want C use C.