tldr/pages/common/indent.md

# indent

> Change the appearance of a C/C++ program by inserting or deleting whitespace.
> More information: <https://www.gnu.org/software/indent/manual/indent/Option-Summary.html>.

- Format C/C++ source according to the Linux style guide, automatically back up the original files, and replace with the indented versions:

`indent {{[-linux|--linux-style]}} {{path/to/source.c}} {{path/to/another_source.c}}`

- Format C/C++ source according to the GNU style, saving the indented version to a different file:

`indent {{[-gnu|--gnu-style]}} {{path/to/source.c}} -o {{path/to/indented_source.c}}`

- Format C/C++ source according to the style of Kernighan & Ritchie (K&R), no tabs, 3 spaces per indent, and wrap lines at 120 characters:

`indent {{[-kr|--k-and-r-style]}} {{[-il|--indent-level]}}3 {{[-nut|--no-tabs]}} {{[-l|--line-length]}}120 {{path/to/source.c}} -o {{path/to/indented_source.c}}`