Compilare: user.cpp: In function ‘int main()’: user.cpp:131:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int z = 0; z < M[acum].size(); z++) ~~^~~~~~~~~~~~~~~~ user.cpp:138:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ToStop.size(); i++) ~~^~~~~~~~~~~~~~~ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:21:38: 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); ^