Responding to Multiple Command Line Prompts - command

Question

I have an exe that runs though Windows Console and prompts for responses for three questions. I created a batch file to contain criteria and would like to automate all three responses to the questions so selecting the bat file runs the data within the batch file.
I need to pass the following criteria
1)machine name
(Enter)
2)password
(Enter)
3)backup
(Enter)
I tried "machinename| exe" and it runs fine, and then brings up the prompt for 2)'s answer. I would like answer all three prompts and then run the exe.

Answer 1

Assuming all inputs are executed via stdin, then either a pipe or redirection should work for all three inputs.
The simplest method is to create a temporary response file and use redirection.
#echo off
>response.tmp (
echo machinename
echo password
echo backup
)
<response.tmp prog.exe
del response.tmp
It would seem it would be easy to use a pipe and get rid of the temp file
(echo machinename&echo password&echo backup)|prog.exe
But there is one problem - the parser inserts a space before each & and the ). This will probably break things.
Note that each side of the pipe is executed via cmd /c, so each side is parsed twice. It is the initial pipe parser that inserts the unwanted space.
The simplest way I have found to prevent the extra space is to delay the appearance of the & so that the parser initially thinks the entire left side is a single ECHO command.
#echo off
setlocal
set "+=&"
echo machinename%%+%%echo password%%+%%echo backup|prog.exe
EDIT
The fact that your program hangs at the password prompt implies that the password is read directly from the console, and not via stdin. In this case, you will need something like the freeware AutoIT utility.