전위, 중위, 후위 구현

void preorder(struct Node *head){		//전위 구현
    if(head != nullptr){
        cout << head -> value << " ";
        preorder(head -> Llink);
        preorder(head -> Rlink);
    }
}

void Inorder(struct Node *head){	//중위 구현
    if(head != nullptr){
        Inorder(head -> Llink);
        cout << head -> value << " ";
        Inorder(head -> Rlink);
    }
}

void Postorder(struct Node *head){	//후위 구현
    if(head != nullptr){
        Postorder(head -> Llink);
        Postorder(head -> Rlink);
        cout << head -> value << "\n";
    }
}