Data Structures | Tree Traversals | Question 4

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What does the following function do for a given binary tree? C
int fun(struct node *root)
{
   if (root == NULL)
      return 0;
   if (root->left == NULL && root->right == NULL)
      return 0;
   return 1 + fun(root->left) + fun(root->right);
}
Counts leaf nodes
Counts internal nodes
Returns height where height is defined as number of edges on the path from root to deepest node
Return diameter where diameter is number of edges on the longest path between any two nodes.
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