Compilare: user.cpp: In function ‘std::bitset<8012u> extract_mult()’: user.cpp:91:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:152:3: note: in expansion of macro ‘re’ re (i, 8002) ^ user.cpp: In function ‘std::bitset<8012u> do_operation(std::bitset<8012u>, std::bitset<8012u>, char)’: user.cpp:125:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘std::bitset<8012u> term()’: user.cpp:172:1: warning: control reaches end of non-void function [-Wreturn-type] } ^