Well, that means that it's also a C++ thing, but streams are an even slicker concept that aren't a C thing, making higher-level code look nice and shiny - and abstracting away loads of I/O pain points while encapsulating useful features.
C++ streams are ugly in their own right, but C++ preferred practice these days is to treat it as its own language rather than as a C superset. That is, lots of crufty old C stuff still works in C++ for legacy reasons, but using it when you don't have to is considered inappropriate.
Yeah, streams are old and crusty and horrific on the inside (don't ask about the time I implemented a socket layer with streams), but still less clunky than the C standard library (unless you're really into being a memory Nazi).