What are the differences between struct and class in C

Question

I now want to understand the distinctions between a C++ class and struct.

Please go through the technical distinctions and the justifications for selecting one over the other in OO design.

I'll start with a clear distinction:

A struct's members are public by default if you don't specify public: or private:, but a class's members are private by default.

In the tucked-away areas of the C++ standard, I'm sure there are other variances.