[pva]

а, подожди, он же кричит что надо заменить Job::cmd_xxx на &main::Job::cmd_xxx

Код:

            _handlers["help"  ] = make_pair(&main::Job::cmd_help,  "brief about instructions");
            _handlers["add"   ] = make_pair(&main::Job::cmd_add,   "add book to storage");
            _handlers["clear" ] = make_pair(&main::Job::cmd_clear, "clear storage");
            _handlers["save"  ] = make_pair(&main::Job::cmd_save,  "save storage to file \"storage.txt\"");
            _handlers["load"  ] = make_pair(&main::Job::cmd_load,  "load storage from file \"storage.txt\"");
            _handlers["erase" ] = make_pair(&main::Job::cmd_erase, "erase one book from storage");
            _handlers["type"  ] = make_pair(&main::Job::cmd_type,  "display storage content");