Compilare: user.cpp: In function ‘int main()’: user.cpp:32:12: warning: unused variable ‘k’ [-Wunused-variable] int m, i, k, maxv, dr, nr, op; ^ user.cpp:32:15: warning: unused variable ‘maxv’ [-Wunused-variable] int m, i, k, maxv, dr, nr, op; ^ user.cpp:32:21: warning: unused variable ‘dr’ [-Wunused-variable] int m, i, k, maxv, dr, nr, op; ^ user.cpp: In function ‘void push(int)’: user.cpp:68:6: warning: unused variable ‘aux’ [-Wunused-variable] int aux; ^ user.cpp: In function ‘int main()’: user.cpp:34:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ user.cpp:36:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &op); ^ user.cpp:38:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr); ^