Compilare: user.cpp: In function ‘int priority(char)’: user.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int eval(char)’: user.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘void polish_form()’: user.cpp:91:25: warning: ‘vf.Elem::prio’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(!stk.empty() && vf.prio >= aux.prio){ ^ user.cpp:62:26: warning: ‘vf.Elem::info’ may be used uninitialized in this function [-Wmaybe-uninitialized] result = eval(vf.info); ^