Compilare: user.cpp: In constructor ‘Nod::Nod()’: user.cpp:20:38: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(leg, NULL, sizeof(leg)); ^ user.cpp: In function ‘bool afis(pnod)’: user.cpp:58:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘bool insert(char*, pnod)’: user.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type] } ^