如何初始化结构指针数组？

Question

I've an array of pointers to structure. Can i initialize all them to NULL as below??

struct hash
{
    int bid;
    struct hash *prev,*next,*fl,*fr;
};

struct hash *h[4]={NULL,NULL,NULL,NULL};

Answer 1

one NULL (or one 0) will be enough since 0 is converted to NULL when assigned to pointers

struct hash *h[4] = {0};

additional info: first element will be initialized to the first value supplied. rest will get 0 according to standards. which part, section of standards? i have no idea but you can find it somewhere in the standards.

Answer 2

Yes!

T *t[] = {NULL, NULL};

Works for each T .

Answer 3

你也可以使用

struct hash *h[]={0,0,0,0};

Answer 4

I think it will work

int main()
{
  struct hash
  {
    int bid;
    struct hash *prev,*next,*fl,*fr;
  };
struct hash *h[5]={0};