Effortless C Code Documentation: Let ChatGPT and Doxygen Do the Work


Doxygen is a powerful documentation generator that can automatically generate documentation from specially formatted comments embedded within your code. It supports multiple programming languages, including C. In this tutorial, we will explore how to use ChatGPT to generate Doxygen documentation comments for C language code.

Before we dive into the process, let’s quickly refresh our understanding of Doxygen syntax. Doxygen comments are written using a specific format that starts with /** and ends with */. Within these comment blocks, various Doxygen commands are used to describe the code elements such as functions, parameters, return values, etc. Some commonly used commands include @brief, @param, @return, and @code.

Now, let’s see how we can leverage ChatGPT to automatically generate Doxygen comments for C code.

Using ChatGPT to Generate Comments

To generate Doxygen comments, use the following prompt format when interacting with ChatGPT:

Write doxygen function description comments for the following code. 

Use doxygen syntaxes, for example:
 @param param

The code:

// Fill your code here


Replace the comment // Fill your code here with the code snippet for which you want to generate Doxygen comments. Provide this modified prompt to ChatGPT and wait for the response.

By combining the suggestions from ChatGPT with the appropriate Doxygen syntax, you can create comprehensive and well-structured documentation comments.

After adding the Doxygen syntax to the generated comments, it’s crucial to review the output and refine it if necessary. While ChatGPT can provide helpful suggestions, it may not always generate accurate or complete documentation. Therefore, it’s important to carefully review the generated comments and make any necessary adjustments to ensure correctness and clarity.


Using ChatGPT to generate Doxygen documentation comments for C code can significantly speed up the documentation process. By following the steps outlined in this tutorial, you can leverage the power of ChatGPT’s language capabilities and combine them with Doxygen’s syntax to create comprehensive and accurate documentation.

Remember to use the Doxygen commands such as @brief, @param, @return, and @code to structure your comments properly. Additionally, make sure to review and refine the generated comments to ensure their correctness and clarity.

Now, armed with this knowledge, you can enhance the documentation process for your C language code and provide valuable insights to other developers using Doxygen. Happy documenting!

Note: ChatGPT is a powerful language model, but it’s important to note that it may not always generate perfect or complete documentation. It’s always recommended to review and refine the generated comments to ensure accuracy and clarity.