Compilare: user.cpp: In function ‘int main()’: user.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sizeof(A); i++){ ~~^~~~~~~~~ user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sizeof(B); i++){ ~~^~~~~~~~~