(defun my/c-mode-hook()
    (c-add-style "mycodingstyle"
                 '((c-basic-offset . 4)
                   (c-comment-only-line-offset . 0)
                   (c-hanging-braces-alist . ((substatement-open before after)))
                   (c-offsets-alist . ((topmost-intro        . 0)
                                       (topmost-intro-cont   . 0)
                                       (substatement         . 4)
                                       (substatement-open    . 4)
                                       (statement-case-open  . 4)
                                       (statement-cont       . 4)
                                       (access-label         . -4)
                                       (inclass              . 4)
                                       (inline-open          . 0)
                                       (innamespace          . 0)))))
    (c-set-style "mycodingstyle")
    (local-set-key (kbd "C-4") 'ff-find-other-file)
    (font-lock-add-keywords 'c++-mode
                            '(("constexpr" . 'font-lock-keyword-face)
                              ("auto" . 'font-lock-keyword-face))))

(add-hook 'c-mode-common-hook 'my/c-mode-hook)
  (add-hook 'c++-mode-common-hook 'my/c-mode-hook)