manevre.cpp: In function 'std::ofstream& operator<<(std::ofstream&, const BigNum&)': manevre.cpp:50: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second: /usr/include/c++/4.4/bits/ostream.tcc:105: note: candidate 1: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char, _Traits = std::char_traits<char>] manevre.cpp:46: note: candidate 2: std::ofstream& operator<<(std::ofstream&, const BigNum&) manevre.cpp:64: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second: /usr/include/c++/4.4/bits/ostream.tcc:105: note: candidate 1: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char, _Traits = std::char_traits<char>] manevre.cpp:46: note: candidate 2: std::ofstream& operator<<(std::ofstream&, const BigNum&)