How to run C code in a website privately? [closed]

I have written really complex (about 2000 lines of code) and useful C program, and I want to run it in my website. I know that there are some services where you can paste your code and let everyone compile it and see it.
But I want to make it in way that visitors can only run the code, and they cannot see it.
Also, I want to update if needed.
Could you tell me if you know anything that would help me in this?