Which is really stupid, given that is no more complicated then opening any text editor and then starting the compiler with that file. You can just double-click the file and select open with the compiler and it would work.
I still had trouble setting up C on my home PC when I was a teenager. I read The C Programming Language and really enjoyed it but couldn't figure out how to get the code to run at home. I went to the local community college and took an intro class that used C++ then I took AP Comp Sci using Java and left the C family behind.