Compilare: user.cpp: In function ‘int main()’: user.cpp:58:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=a; i<=b; i++) ^ user.cpp:71:13: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << ret << ' ' << max << ' ' << nr; ^ user.cpp:71:43: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << ret << ' ' << max << ' ' << nr; ^