How do I display an error message when a user inputs nothing

I have a quick question. I'm making a little craps game, and I have an annoying problem. Whenever a user is asked for input, and inputs nothing, the cursor goes from the input area to the next line. I want to keep this from happening. I've been told it's probably a windows specific thing, but I can't find any info on it anywhere.

Thanks in advance.

I'm guessing you're using cin to read in from the user. I suggest
using cin.getline - if the user just hits enter, the program doesn't
keep waiting for input - you can reprint the cursor position.