Question

In C++, when would you use a struct over a class?

Answer 1

when i can't be bothered with "public:", which is always

Answer 2

Heh. A pretty fair point. You should watch out though. More than in many languages, public is dangerous in C++ if you're writing a library. All public interfaces are fragile in C++ because changing any of a number of tiny details will make them binary incompatible with previous versions. Also see things like the d-ptr pattern used by the Qt toolkit to avoid this as much as possible -> http://en.wikipedia.org/wiki/Opaque_pointer#C.2B.2B .

Other than that, yeah, there's no real reason to use structs. Literally the only difference is that they have public members by default, rather than private.