Convert a tree to array

Here is the simple code for converting a BST to array of numbers:

/* Converting a BST into an Array */
void TreeToArray(struct Tree *node, int a[]){
static int pos = 0;

if(node){
TreeToArray(node->left,a);
a[pos++] = node->data;
TreeToArray(node->right,a);
      }
}

For other tree operations and complete code refer to : click here