Ubuntu 14.10系统，，通过emacs package system安装了模块auto-complete-clang
然后进入.emacs.d/init.el中如下配置：
;; auto complete (require ‘auto-complete)(add-to-list ‘ac-dictionary-directories "~/.emacs.d/elpa/auto-complete-20150408.1132/ac-dict/")(add-to-list ‘ac-user-dictionary-files "~/.emacs.d/elpa/auto-complete-20150408.1132/ac-dict//dean.dict")(require ‘auto-complete-config);; end;; auto-complete-clang (require ‘auto-complete-clang);;(setq ac-clang-auto-save t);; 设置不自动启动 (setq ac-auto-start nil);; 设置响应时间 0.5 (setq ac-quick-help-delay 0.5);;(ac-set-trigger-key "TAB");;(define-key ac-mode-map [(control tab)] ‘auto-complete);; 提示快捷键为 M-/ (define-key ac-mode-map (kbd "M-/") ‘auto-complete)(defun my-ac-config ()(setq ac-clang-flags(mapcar(lambda (item)(concat "-I" item))(split-string" /usr/include/c++/4.9 /usr/include/c++/4.9/backward /usr/include"))) (setq-default ac-sources ‘(ac-source-abbrev ac-source-dictionary ac-source-words-in-same-mode-buffers)) (add-hook ’emacs-lisp-mode-hook ‘ac-emacs-lisp-mode-setup) (add-hook ‘c-mode-common-hook ‘ac-cc-mode-setup) (add-hook ‘ruby-mode-hook ‘ac-ruby-mode-setup) (add-hook ‘css-mode-hook ‘ac-css-mode-setup) (add-hook ‘auto-complete-mode-hook ‘ac-common-setup) (global-auto-complete-mode t))(defun my-ac-cc-mode-setup () (setq ac-sources (append ‘(ac-source-clang ac-source-yasnippet) ac-sources)))(add-hook ‘c-mode-common-hook ‘my-ac-cc-mode-setup);; ac-source-gtags(my-ac-config)(ac-config-default);; end
现在打开代码，在vector对象v后面输入v.pu
然后用M-/ 后等待，会自动显示push_back。
有时候不显示的原因是之前没有键入代码，不过没有关系，会逐渐学习。
现在还有个问题, auto-complete-clang貌似没有真正工作，因为提示过于简陋。还需要继续研究。
天才就是这样，终身努力，便是天才。
