Compilare: user.cpp: In member function ‘bool Hash::search(int, int&)’: user.cpp:16:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < lists[indice].size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~ user.cpp: In member function ‘bool Hash::search(int)’: user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < lists[indice].size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~ user.cpp: In member function ‘void Hash::remove(int)’: user.cpp:46:13: warning: unused variable ‘indice’ [-Wunused-variable] int indice, listIndice = 0; ^~~~~~ user.cpp: In function ‘int main()’: user.cpp:57:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ user.cpp:58:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^ user.cpp:61:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:65:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &op); ^ user.cpp:66:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr); ^