我在为模板类重载operator#ifndef_FINITEFIELD#define_FINITEFIELD#includenamespacePolyff{templateclassFiniteField;templatestd::ostream&operator&);templateclassFiniteField{public://someotherfunctionsprivate:friendstd::ostream&operator(std::ostream&out,constFiniteField&obj);T_val;};templatestd::ostream&opera