Hi, I am an experienced programmer and have been programming in C/C++ for years. I can help you find errors in your code. However, Nano is just an editor and if you mean how could one get the syntax error highlighting to work in Nano, then I am afraid I can't help you much.
For finding errors in your code in general, you can completely rely on me. If I could bid any lower, I would so as to get a foot in the freelancing room. Rest assured you will get quality work and please don't hesitate to contact me if you have any questions.
Thank you for your time.