typedef struct of struct

[Coolness]

I'm trying to use some structs from something I didn't make. They're defined as follows:

typedef struct Pxy_t {
    double x, y;
} Pxy_t;
typedef struct Pxy_t Ppoint_t;

and somehow I need to give a Ppoint_t to a function.
They show a sample, initializing

static Ppoint_t ps[] = {
    { 1.0, 2.5 },
    { 4.7, 3.2 }
};

and feed ps to the function.
But I'm looking to fill these values in dynamically, but I can't figure out for the life of me how to declare an equivalent to ps. Everything I've tried results in "Ppoint_t: illegal use of this type as an expression." The function declaration lists "Ppoint_t endpoints[2]," but that doesn't work either. I've also never seen typedef struct A B where A is a struct declared as typedef struct A {} A;

strange to me!

[laserlight]

Basically, you want to create a dynamic array of Ppoint_t? If so, you would use a std::vector<Ppoint_t> in C++ or a pointer to Ppoint_t and malloc(), calloc(), realloc() and free() in C.

[Coolness]

Ppoint_t* ps;

"'Ppoint_t' : illegal use of this type as an expression "

maybe something else is going on here, hmmm

[laserlight]

Okay, state whether you are programming in C or C++, then provide the smallest and simplest program that demonstrates the error.

[Coolness]

Hi,
Well you definitely put me in the right direction. Thanks!
This was actually for compilation of a MEX file for matlab, which unbeknownst to me invoked c, so my variable declaration halfway through code wasn't allowed. Bingo!