I'm receiving three errors on c++ code>. How do I fix?

error: variable or field '_print_tree' declared void

33 | void _print_tree(Node *current) {

error: 'Node' was not declared in this scope

33 | void _print_tree(Node *current) {

error: 'current' was not declared in this scope

33 | void _print_tree(Node *current) {

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#include

using namespace std;

int nodeLevel(int value) {

if (root == NULL) {

return -1;

} else {

return _nodeLevel(value, root, 0);

}

}

int _nodeLevel(int value, Node *current, int level) {

if (current == NULL) {

return -1;

} else if (value == current->data) {

return level;

} else if (value < current->data) {

return _nodeLevel(value, current->left, level+1);

} else {

return _nodeLevel(value, current->right, level+1);

}

}

def print_tree() {

if (root == NULL) {

return;

} else {

_print_tree(root);

}

}

void _print_tree(Node *current) {

if (current == NULL) {

return;

} else {

_print_tree(current->left);

cout << current->data << endl;

_print_tree(current->right);

}

}