Compilare: main.cpp: In constructor 'Poli::Poli(std::vector<std::complex<double> >)': main.cpp:98:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < v.size() ; i++){ ~~^~~~~~~~~~ main.cpp: In member function 'void Poli::add(int)': main.cpp:106:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr >= coef.size()){ ~~~^~~~~~~~~~~~~~ main.cpp: In function 'Poli mult(Poli, Poli)': main.cpp:116:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(n < fa.size() + fb.size()) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:155:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x >= a.coef.size()){ ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:14:29: 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); ^