Compilare: user.cpp:3:11: warning: literal operator suffixes not preceded by ‘_’ are reserved for future standardization #define s second ^ user.cpp:3:11: warning: literal operator suffixes not preceded by ‘_’ are reserved for future standardization #define s second ^ user.cpp:3:11: warning: literal operator suffixes not preceded by ‘_’ are reserved for future standardization #define s second ^ user.cpp:3:11: warning: literal operator suffixes not preceded by ‘_’ are reserved for future standardization #define s second ^