gcc foo.cpp
$ gcc foo.cpp /usr/bin/ld: Undefined symbols:__Unwind_Resumestd::basic_istream<char, std::char_traits<char> >::operator>>(int&)std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))std::basic_ostream<c ..... $ g++ foo.cpp $
ばっかじゃねーの。