C :: Binary Search Tree In Linked List

Code:

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
struct bst {
int val, level;
struct bst *left, *right, *parent;

[Code]....

The code above is supposed to be a binary search tree. The main outcome for this program is to display the tree in C each time the user inserts or deletes a value.

Since I am a newbie in C programming, I first tried creating a code that would simply display the values in the tree after a user inserts and deletes, before I proceed to displaying the exact tree.

But when I run it the following output shows:

And when I try to insert another value, It won't display anything and won't respond to any keys pressed.