Compilare: user.cpp: In function ‘int main()’: user.cpp:8:14: warning: unused variable ‘top’ [-Wunused-variable] long int k, top = 0, putere[4] = {0, 1, 1, 1}, v[4] = {1, 0, 0, 1}, dummy[4]; ^ user.cpp:9:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in", "r", stdin); ^ user.cpp:10:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out", "w", stdout); ^ user.cpp:11:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &k); ^