Program1.bat

@echo off
echo results.txt
echo Joseph De la Nuez >> results.txt
set dt=%date:~4,2%-%date:~14,2%-%date:~19,4%_%time:~0,2%_%time:~0,2%_%time:~8,2%
echo %dt% >> results.txt

set /p a= Enter 1st number:
if %a% equ 999 (goto:eof) else (goto:promptb)
:promptb
set /p b= Enter 2nd number:
if %b% equ 999 (goto:eof) else ( if %b% equ 0 (goto:promptb))
:calculate
:loop