Compilare: main.cpp: In member function 'nod* ARBORE::del(nod*, int)': main.cpp:230:12: warning: unused variable 't' [-Wunused-variable] 230 | { nod *t,*q; | ^ main.cpp:264:5: warning: control reaches end of non-void function [-Wreturn-type] 264 | } | ^ main.cpp: In member function 'int ARBORE::pref(int)': main.cpp:339:5: warning: control reaches end of non-void function [-Wreturn-type] 339 | } | ^ main.cpp: In member function 'int ARBORE::suf(int)': main.cpp:309:5: warning: control reaches end of non-void function [-Wreturn-type] 309 | } | ^