Depends which of the hundreds of C compilers you used, as some "bool" are cast as uint8_t, others unsigned char, and others bit-packed with an optimizer.

With C, any claim one makes about repeatability is always wrong at some point depending on the version compliance.

I like C, but Haskell is a happy optimistic syntax... Julia is probably the language I'd wager becoming more relevant as Moore's laws corpse begins to stink. =3