C thread

I'm starting to program C , and I made a basic C program hello.c
and I've written it on notepad. I want to compile it on DOS. How do I do that? Is it a problem if the file is written as hello.c.txt in dos? I did gcc hello.c but it wouldn't work. How do I compile C programs on dos?

troll or incredibly retarded idiot that doesn't know what file extensions are