C-指向结构，语法的指针的数组

Question

I've got a struct A and an array of pointers to instances of that struct
I'm trying to access a member directly from the array but I don't know what's the right syntax to do it :

struct A  
{  
  int a;  
  void** b;  
}

A* p = (A*) malloc(sizeof(A));  
p->b = (A**) malloc(sizeof(A*) * 3);

//
// something is done
//

int c;

A* test = p->b[0];
c = test->a;

Basically what I'm asking is how do I get rid of the intermediate A* test so I can assign the value of c in one line ?

Answer 1

Just do

int c = ((struct A*) (p->b[0]))->a;

---

Defining

struct A  
{  
  int a;  
  struct A ** b;  
}

this would do

int c = p->b[0]->a;

Answer 2

你可以做 ：

c = ((A*) (p->b[0]))->a;