void _tree_delete_support(node* x){
    if(x->left_child != NULL){
        _tree_delete_support(x->left_child);
        x->left_child = NULL;
    }
    if(x->right_child != NULL){
        _tree_delete_support(x->right_child);
        x->right_child = NULL;
    }
    x->parent = NULL;
    free(x);
}
void tree_delete(tree* tree){
    if(tree->root == NULL){
        printf("Empty Tree\n");
    }else{
        _tree_delete_support(tree->root);
        tree->root = NULL;
    }
}