Compilare: user.cpp: In function ‘void back(int, int)’: user.cpp:89:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:123:5: note: in expansion of macro ‘re’ re (j, 4) ^ user.cpp:89:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:126:5: note: in expansion of macro ‘re’ re (j, 4) ^ user.cpp: In function ‘void iterative_back()’: user.cpp:89:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:156:9: note: in expansion of macro ‘re’ re (p7, max_7 + 1) ^ user.cpp:89:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:155:7: note: in expansion of macro ‘re’ re (p5, max_5 + 1) ^ user.cpp:89:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:154:5: note: in expansion of macro ‘re’ re (p3, max_3 + 1) ^ user.cpp:89:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:153:3: note: in expansion of macro ‘re’ re (p2, max_2 + 1) ^