Umm, all that will give him/her is a BLANK floppy boot disk
Did you mean to type: (format c: /s)
Did you mean to type: (format c: /s)
Nope. "format a: /s" will create a bootable floppy. In my next sentence, I said to copy format.com, sys.com, and fdisk.exe to the floppy (which will then no longer be blank). Then when you boot from the floppy, you can do the fdisk and format of the C: drive.
If you fdisk while booted from the C: drive, it will have you reboot after you delete the partition and then you will have no operating system from which to format the C: drive. Again, as I stated, you would only need to do this if you cannot boot from the CD.