just cause it's closed doesn't mean it's not running still. ctrl-alt-delete and bring up the task manager, end the processes of all the progs you created. If you don't know what it is and it's not one you personally created, don't end it, it may be important.
I'm running XP and have been compiling with DOS C compiler (djgpp).
Wow I hadn't thought of DJGPP in forever. Was hard to get a 'real' compiler back in the day when I did. If you find it hard to use you may want to look into any number of alternatives, I'm fairly sure Microsoft's visual C++ will work just fine if you only use C.
I've now got a whole lot of .exe files for each of the programs and can't see to delete them. I've tried deleting them through dos and everything.
I'm running XP and have been compiling with DOS C compiler (djgpp).
When I try to delete it typically says "Cannot delete: It is being used by another program".. but I've got everything closed.