Revision as of 12:26, 31 March 2012

c-mode is the default major mode for editing C source files (.c and .h files). It uses cc-mode.

Basic setup

c-mode is bundled with Emacs by default. No additional setup is required.

Helpful keybindings

[C-M-a]: Go to the beginning of the current function. If you are between 2 functions, go the start of the previous one.

[C-M-e]: Go to the end of the current function. If you are between 2 functions, go to the end of the next one.

Common Customization

Change default indenting style

Style

Any mode based on cc-mode provides automatic indentation. The default style is gnu. It is the one recommended by the Free Software Foundation for GNU projects but you can use a different one.

Here is a basic list of predefined styles:

gnu: The default style for GNU projects
k&r: What Kernighan and Ritchie, the authors of C used in their book
bsd: What BSD developers use, aka “Allman style” after Eric Allman.
whitesmith: Popularized by the examples that came with Whitesmiths C, an early commercial C compiler.
stroustrup: What Stroustrup, the author of C++ used in his book
ellemtel: Popular C++ coding standards as defined by “Programming in C++, Rules and Recommendations,” Erik Nyquist and Mats Henricson, Ellemtel
linux: What the Linux developers use for kernel development
python: What Python developers use for extension modules
java: The default style for java-mode (see below)
user: When you want to define your own style

You can look the cc-mode documentation for a complete list of builtin style. For visual example of each style you can look the Wikipedia article on indenting style.

The default style is set via the variable c-default-style
Use [C-c .] (or M-x c-set-style) to change the indentation style of the current buffer.
The amount of space use to indent is set via the variable c-basic-offset.

To set the default style to K&R and use 4 spaces, add this to your Emacs configuration file:

; set k&r style
(setq c-default-style "k&r")
; indent with 4 spaces
(setq c-basic-offset 4)

GNU/Linux

OS X

Windows

Emacs-24

Emacs-23

Project Pages

cc-mode

Tutorial Pages

@@ Line 28: / Line 28: @@
 == Change default indenting style ==
-=== Style ==
+== Style ==
 Any mode based on {{ModeLink|cc-mode}} provides automatic indentation. The default style is <code>gnu</code>. It is the one recommended by the Free Software Foundation for GNU projects but you can use a different one.
@@ Line 56: / Line 56: @@
 For visual example of each style you can look the [http://en.wikipedia.org/wiki/Indent_style Wikipedia article on indenting style].
-* The default style is set via the variable {{Var|c-default-style}}
+* The default style is set via the variable {{Variable|c-default-style}}
-* Use {{KeyCommand|C-c .|c-set-style}} to change the indentation style of the current buffer.
+* Use {{CommandKeys|C-c .|c-set-style}} to change the indentation style of the current buffer.
-* The amount of space use to indent is set via the variable {{Var|c-basic-offset}}.
+* The amount of space use to indent is set via the variable {{Variable|c-basic-offset}}.
 To set the default style to K&R and use 4 spaces, add this to your {{EmacsConfigFile}}:

Difference between revisions of "C-mode"