Question

A pointer to a function explination please?

Answer 1

I've never seen this before and im confused as to what does it do and what is it equivalent to? Im learning how to create Binary Search Trees in C with the structure as follows
```
typedef int ElementType;

typedef struct treeNode
{
ElementType data;
struct treeNode *left;
struct treeNode *right;
}TREE;
```
and im reading on the internet and i come across this function
```
TREE *createNode()
{
TREE *tempNode;
tempNode = malloc(sizeof(TreeNode));
tempNode->element = 0;
tempNode->left = NULL;
tempNode->right = NULL;
return tempNode;
}
```
What does a pointer to a function do? I'm confused.

Answer 2

And why is it used too.

Answer 3

Not something I could sum up, but take a look at this:
http://www.cprogramming.com/tutorial/function-pointers.html

Answer 4

The very bottom of this gives a shorter example:
http://www.cplusplus.com/doc/tutorial/pointers/