copy the following (upto exit) and paste in notepad, save the file as calculator.bat
the name can be anything but .bat is necessary.


@echo off
ECHO -Title Batch Calculator by
ECHO -(your name)
color 72
:top
echo.

echo -Welcome to Batch
echo -Calculator by *(your name)!-
echo.

echo Enter your operand
echo.
set /p sum=
set /a ans=%sum%
echo.
echo = %ans%
echo

pause
cls
echo Previous Answer:
%ans%
goto top
pause
exit


at the place of 72 (colour),you can combine any of the below. The first letter is background colour, and the second is font colour
example: 7 background, 2 font.

BACKGROUND FOREGROUND

0 BLACK 8 GREY
1 BLUE 9 LIGHT BLUE
2 GREEN A LIGHT GREEN
3 AQUA B LIGHT AQUA
4 RED C LIGHT RED
5 PURPLE D LIGHT PURPLE
6 YELLOW E LIGHT YELLOW
7 WHITE F BRIGHT WHITE

Please inform me if it works... and please hit the like...

my fb account name is Devanam Priyan (with a cover page of a cat)