Write a recursive function "int CountLeaf(BITree t)" which count the number of leaf nodes in the binary tree. (Hint: binary tree is defined as follow) struct BiTreeNode ElementType Element; struct...

Extracted text: Write a recursive function "int CountLeaf(BITree t)" which count the number of leaf nodes in the binary tree. (Hint: binary tree is defined as follow) struct BiTreeNode ElementType Element; struct BiTreeNode "Left; struct BiTreeNode "Right; typedef struct BiTreeNode *Position, "BiTree;