Compilare: user.cpp: In function ‘bool cauta(int, int)’: user.cpp:134:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0 ; j < h[hx].size() ; ++j) { ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:23:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^