!139 update docs-en/contribute/contributing-code.md.

* update docs-en/contribute/contributing-code.md.

docs-en/contribute/contributing-code.md

@@ -6,9 +6,9 @@
 
 Develop, review, and test code following the OpenHarmony coding standards. Make sure code is written in the same style.
 
--   C++ Coding Style Guide
--   C Coding Style Guide
--   JavaScript Coding Style Guide
+-   [C++ Coding Style Guide](OpenHarmony-cpp-coding-style-guide.md)
+-   [C Coding Style Guide](OpenHarmony-c-coding-style-guide.md)
+-   [JavaScript Coding Style Guide](OpenHarmony-JavaScript-coding-style-guide.md) 
 -   [Python Coding Style Guide](https://pep8.org/)
 
 ## Contribution Workflow<a name="en-us_topic_0000001051566732_section15769105812369"></a>