Compilare: user.cpp: In function ‘void insert(Trie*, int, int)’: user.cpp:76:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos >= v[indice].size()) { ^ user.cpp: In function ‘int sim(int)’: user.cpp:88:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(vect[ind[1]].size() <= i + step) ^ user.cpp:93:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(vect[ind[j]].size() <= i + step || vect[ind[j]][i + step] != vect[ind[1]][i + step]) ^ user.cpp: In function ‘int main()’: user.cpp:104:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ratina.out", "w", stdout); ^ user.cpp: In constructor ‘Reader::Reader(const char*)’: user.cpp:28:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, sizeof buf, f); ^ user.cpp: In member function ‘void Reader::move()’: user.cpp:20:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, sizeof buf, f); ^