void ADDRESS_BOOK :: operator<< (ostream& f);
[Error] extra qualification ‘ADDRESS_BOOK::’ on member ‘operator<<’ [-fpermissive]
how can I solve this error?
void ADDRESS_BOOK :: operator<< (ostream& f);
[Error] extra qualification ‘ADDRESS_BOOK::’ on member ‘operator<<’ [-fpermissive]
how can I solve this error?