How to Install and Use Doxygen for Generating Code Documentation

Doxygen automatically extracts comments from source code and generates documentation for classes, functions, variables, and other entities.

Installation commands:

sudo apt-get install doxygen

brew install doxygen

On Windows, download the executable from the official website.

Create a default configuration file with doxygen -g Doxyfile and edit it using a text editor to suit your project.

Common configuration options include:

PROJECT_NAME: set the project name

PROJECT_BRIEF: brief description of the project

INPUT: specify source files or directories to document

OUTPUT_DIRECTORY: directory where generated docs are placed

GENERATE_HTML: YES to produce HTML output

GENERATE_XML: YES to produce XML output

EXTRACT_ALL: YES to extract all comments

EXTRACT_PRIVATE, EXTRACT_STATIC: YES to include private and static members

Run Doxygen with the command doxygen Doxyfile ; it processes the source according to the configuration and writes the documentation to the specified output directory.

Open the generated index.html in the output folder to view the HTML documentation.

Doxygen supports multiple output formats such as HTML, XML, and LaTeX, and allows extensive customization of style and structure.

Before generating documentation, ensure that appropriate comments are added to the source code so Doxygen can extract them correctly.

For more detailed options and usage, refer to the official Doxygen documentation at https://www.doxygen.nl/index.html .