If you don't regularly program in either C or C++, you don't know shit about programming. Now, it might be true that that you do in fact program regularly in C or C++ AND still don't know shit about programming, but it's never the case that someone who rarely programs in C/C++ knows shit about programming, therefore the original statement still holds true.
5.3.3 Sizeof [expr.sizeof] 6. The result of sizeof and sizeof... is a constant of type std::size_t. [ Note: std::size_t is defined in
the standard header <cstddef> (18.2). —end note ]
Not Turing-complete = strictly less powerful than Turing-complete languages. Even Brainfuck.
I don't think you understand what Turing completeness is. Both C and C++ are Turing complete.