Compilare: user.cpp:10:17: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] const int MaxN=1<<16+5; ^ user.cpp: In member function ‘base base::operator*=(double)’: user.cpp:39:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘base base::operator+=(const base&)’: user.cpp:45:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^