Purpose of struct, typedef struct, in C++

Question

In C++ it is possible to create a struct:

struct MyStruct
{
    ...
}

And also possible to do the following:

typedef struct         


        

Answer 1

The typedef version is a special case of

typedef foo bar;

which defines a new "type" bar as an alias for foo. In your case, foo happens to be a struct. In C, this was the only way to introduce new "types" (in quotes, because they are not really equivalent to int, float and co). In C++, this is not so useful, because C++ was designed to make definition of new types easier and more complete than C (at least at the beginnings of C++), and the typedef is not even necessary to refer to a previously declared struct (or class).