Compilare: main.cpp: In member function 'Dp Dp::operator*=(Dp)': main.cpp:28:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In member function 'Dp Dp::operator+=(Dp)': main.cpp:41:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'Dp factor()': main.cpp:67:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < s.size() && s[p] == 'S') { ~~^~~~~~~~~~ main.cpp: In function 'Dp expresie()': main.cpp:76:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < s.size() && s[p] == 'P') { ~~^~~~~~~~~~