Passing an array of structs in C

Question

I\'m having trouble passing an array of structs to a function in C.

I\'ve created the struct like this in main:

int main()
{
    struct Items
    {
          


        

Answer 1

The function won't know that the type struct Items exists if you declare it only locally inside the main function body scope. So you should define the struct outside:

struct Item { /* ... */ };

void ReadFile(struct Items[]);   /* or "struct Item *", same difference */

int main(void)
{
  struct Item my_items[10];
  ReadFile(my_items);
}

This is dangerous of course since ReadFile has no idea how big the array is (arrays are always passed by decay-to-pointer). So you would typically add this information:

void ReadFile(struct Items * arr, size_t len);

ReadFile(my_items, 10);