Compilare: main.cpp: In function 'void sterge(Node*)': main.cpp:322:22: warning: statement has no effect [-Wunused-value] nod->parent->left == nullptr; ~~~~~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:324:23: warning: statement has no effect [-Wunused-value] nod->parent->right == nullptr; ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'Node* find(Node*, int)': main.cpp:71:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'Node* insert(Node*, Node*)': main.cpp:241:1: warning: control reaches end of non-void function [-Wreturn-type] } ^