C structs don't define types?

Question

I\'ve just started learning C with a professional Java background and some (if no too much) C++ knowledge, and I was astonished that this doesn\'t work in C:

str         


        

Answer 1

You first need to make Point a type like :

typedef struct Point {
    int x;
    int y;
} Point;

This allows you to use Point as a type, or struct Point

I.e:

Point *p;

sizeof(struct Point);

Some people prefer to make the name of the structure different from the type being created, such as:

typedef struct _point {
       ...
} Point;

You'll run into both. The last example tells me that I should not use struct _point, its not meant to be exposed except as the type Point.