Compilare: user.cpp: In function ‘void check(int, int, bool*)’: user.cpp:41:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < myPrime.size(); i++) ^ user.cpp:50:21: warning: ‘nr2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<nr1<<' '<<nr2<<'\n'; ^ user.cpp:50:11: warning: ‘nr1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<nr1<<' '<<nr2<<'\n'; ^