This is a simple tutorial with some tips on how to use Doxygen to document codes and how to show the HTML page.
What is Doxygen
Doxygen is a tool to generate documentation from source code. It is primarily used for C++ codes, but it also supports other popular programming languages such as C, Objective-C, C#, PHP, Java, Python, IDL, Fortran, VHDL, Tcl, and to some extent D. You can see more information here.
You can download the Doxygen here.
How to document you code
In order to generate Doxygen documentation, you need to comment the code in a specific way. You can take a look at this page to see more information on how to comment your code.
How to see the HTML page on SVN
When you comment your code using the Doxygen style, after compiling, it generates an HTML page.