C typedef of pointer to structure

Question

I had come across the following code:

typedef struct {
        double x;
        double y;
        double z;
} *vector;

Is this a v

Answer 1

It a valid one, what it does is it defines a new type. As @Alex said, it would be useful to define a type and pointer type.

You could create more pointers just by using

S1PTR ptr1, ptr2, ptr3, ...;  

instead of

S1 *ptr1, *ptr2, *ptr3, ...;