Compilare: main.cpp:5:9: warning: #pragma once in main file #pragma once ^~~~ main.cpp: In instantiation of 'void BTree<T>::m_deleteTree(BTree<T>::Node*&) [with T = int]': main.cpp:705:14: required from 'BTree<T>::~BTree() [with T = int]' main.cpp:713:16: required from here main.cpp:697:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < node->children.size(); ++i)