Relax, killdisk did its job.
Killdisk does not restore anything, it wipes your drive clean. You have no operating system because it wiped your drive clean as its supposed to do.
This is for that laptop earlier today, correct? Since you only have a CD Rom drive and a hard drive I'm assuming that "A" is your CD Rom drive and "C" is your hard drive. Now that you have a clean drive, follow the Win 98 instructions on the page I gave you earlier today. Relax, take a few breaths, you'll get through this.