Subversion：从包含用户名的每个签到生成完整差异

I have a professor that doesn't understand source control very well. He asked us to use comments to determine who wrote each line of code. Most of the class is using email as version control and Visual C++ as the language which leads to a mess of comments, carets and generated code. My group is using subversion and C# and I would prefer to get the history from the repository instead of cluttering the code with comments on every line.I have a professor that doesn't understand sour