A
typical C library contains a
struct
and some associated functions to act on that
struct.
So far, you've seen how C++ takes functions that are
conceptually
associated and makes them
literally
associated, by
putting
the function declarations inside the scope of the
struct,
changing the way functions are called for the
struct,
eliminating the passing of the structure address as the first argument, and
adding a new type name to the program (so you don’t have to create a
typedef
for the
struct
tag).
These
are all convenient – they help you organize your code and make it easier
to write and read. However, there are other important issues when making
libraries easier in C++, especially the issues of safety and control. This
chapter looks at the subject of boundaries in structures.