Programming questions

typedef struct node

{

int data;

struct node *left, *right;

}BT;

The node structure of the binary tree (BT) is shown above. There is a binary tree T, please complete the function:

int degreeone(BT *T) to compute how many degree 1 node in the BT. The T is the root pointer, and the function shoule return the total number of degree 1 node.