C++: When should I use structs instead of classes and where are the speed differences?

Question

• When should I use a struct instead of a class? I\'m currently using classes for everything from OpenGL texture wrappers to bitmap fonts.

• Is

Answer 1

Structs and classes in C++ as you may know differ solely by their default access level (and default accessibility of their bases: public for struct, private for class).

Some developers, including myself prefer to use structs for POD-types, that is, with C-style structs, with no virtual functions, bases etc. Structs should not have behavior - they are just a comglomerate of data put into one object.

But that is naturally a matter of style, and obviously neither is slower