Question: void tree _ iterator _ begin ( tree _ iterator _ t * iter, tree _ node _ t * root ) { #define MAX

void tree

_

iterator

_

begin

(

tree

_

iterator

_

*

iter, tree

_

node

_

*

root

)

{

#define MAX

_

DEPTH

30

typedef struct

{

tree

_

node

_

*

curr;

/ /

Pointer to the current node

unsigned int depth;

/ /

Current depth in the tree

(

root is at depth

0)

tree

_

node

_

*

parents

[

MAX

_

DEPTH

]

;

/ /

Pointer to parent nodes

}

tree

_

iterator

_

/ /

Helper struct for iterating through a tree

- -

represents a current location within the tree

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