how to run compiled programs?

i can't seem to run the programs i compiled ie int main(){printf ("Hi, world!\n");} it compiles but i get the "command not found" error mesg. what am i doing wrong? please help!!! Get Your Private, Free Email at http://www.hotmail.com

floppy image HOWTO?

How do you make disk images??? I've got a bunch of old setup disks that I would like to archive onto a cd. How do I copy the image onto a file? Any pointers? Thanks. Get Your Private, Free Email at http://www.hotmail.com

Prob:block on freelist at 00b10bd1 isn't free

Can anyone help me with this error mesg? Prob:block on freelist at 00b10bd1 isn't free I usually get it when I am using the dselect program, afterwhich any program I run (including shutdown) will result in the same error mesg. The only solution currently is to rebot the system. ___