Compilare: user.cpp: In function ‘int main()’: user.cpp:29:66: warning: operation on ‘p2’ may be undefined [-Wsequence-point] else if (T[i] == 2) fout << p2 ++ << ' ' << p2 ++ << '\n'; ^ user.cpp:30:82: warning: operation on ‘p3’ may be undefined [-Wsequence-point] else if (T[i] == 3) fout << p3 ++ << ' ' << p3 ++ << ' ' << p3 ++ << '\n'; ^