Binding a key in C/C++ mode only?

Question

I would like to bind my TAB key in emacs to clang-format-region when in C/C++ mode. How do I achieve this without affecting other modes? In particular, global-set-key doesn't achieve what I want, since it makes editing text with emacs a tad difficult.

Answer 1

You can use define-key on c-mode-base-map (C, C++ ...)

(define-key c-mode-base-map (kbd "<tab>") 'clang-format-region)

Answer 2

You may use local-set-key

(add-hook
     'c++-mode-hook
      (lambda ()
      (local-set-key (kbd "<tab>") #'clang-format-region)))