Compilare: user.cpp: In function ‘int main()’: user.cpp:22:18: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, k, dr, j, nr, r; ^ user.cpp:22:21: warning: variable ‘dr’ set but not used [-Wunused-but-set-variable] int n, m, i, k, dr, j, nr, r; ^ user.cpp:22:28: warning: unused variable ‘nr’ [-Wunused-variable] int n, m, i, k, dr, j, nr, r; ^ user.cpp:22:32: warning: unused variable ‘r’ [-Wunused-variable] int n, m, i, k, dr, j, nr, r; ^