Compilare: main.cpp: In constructor 'Poli::Poli(std::vector<std::complex<double> >)': main.cpp:37:22: 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:45:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr >= coef.size()){ ~~~^~~~~~~~~~~~~~ main.cpp: In function 'Poli mult(Poli, Poli)': main.cpp:55:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(n < fa.size() + fb.size()) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:94:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x >= a.coef.size()){ ~~^~~~~~~~~~~~~~~~