#include <stdlib.h>
#include <stdio.h>
#include "bst.h"

void indent(int x, int key){
if (x == 0){ printf("%d\n", key); }
else { printf ("  ");
       indent(x-1, key);
       }
 }

void printbst(BST t, int x){

if (t == NULL){ printf(""); }
else{
  printbst(BSTright(t), (x + 1));
  indent(x, BSTkey(t));
  printbst(BSTleft(t), (x + 1));
  }
}

int main(void){

BST x = BSTmake(2, (BSTmake( 1, NULL, NULL)), (BSTmake(3, NULL,NULL)));
BST y = insertbst(4, x);
printbst(y,0);


BSTdestroy(y);

}