Thread: Help with pointer to structure

Hi, I'm just getting started with structures on C and they don't seem to bad but my main question is about pointers to structures.

Basically I have a structure containing a vector array and length and 'vs' has to be a pointer to a structure of this sort. So I defined 'vs' as such:

Code:

typedef struct
{
    vector arr[100];
    int length;
}ps, *vs;

where vector is:

Code:

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

I have a function that makes pointers of structures of type 'vs' but I'm not sure on how to set it up. The way only way I could think of it was to make a structure of the same type as '*vs' called 'ps' and initialize 'ps' thus making 'vs' = the address of the initialized 'ps' like so:

Code:

vs *make_vs ()
{
	ps strt = {{0,0},0}; // initializing instance of structure 'ps'
	vs *ptr;                      // declaring instance of '*vs'
	ptr = &strt;                // setting ptr to the address of 'strt'
	return ptr;                 // returning pointer of type 'vs'
}

I'm really not sure if I'm going about this the correct way. I basically just want to created a new instance of the structure defined above and return a pointer to that structure.

Such that I can utilize it like so:

Code:

vs a = *make_vs (); // or however I am supposed to create a new instance

The ultimate goal is to create these 'vs' pointers and be able to add/remove/get vectors from the array the structure holds. If that made any sense to anyone, could you please enlighten me or point me in the right direction?

Thank you