calculator

@echo off
setlocal EnableDelayedExpansion

:calculator
cls
echo Simple Batch Calculator
echo ----------------------
echo 1. Addition
echo 2. Subtraction
echo 3. Multiplication
echo 4. Division
echo 5. Exit

set /p choice=Enter your choice (1-5):

if "%choice%"=="1" goto addition
if "%choice%"=="2" goto subtraction
if "%choice%"=="3" goto multiplication
if "%choice%"=="4" goto division
if "%choice%"=="5" goto :eof

:input
set /p num1=Enter first number:
set /p num2=Enter second number:

:math
if "%operation%"=="add" set /a result=num1+num2
if "%operation%"=="sub" set /a result=num1-num2
if "%operation%"=="mul" set /a result=num1*num2
if "%operation%"=="div" (
    if "%num2%"=="0" (
        echo Error: Cannot divide by zero.
        pause
        goto calculator
    ) else (
        set /a result=num1/num2
    )
)

:output
echo Result: %result%
pause
goto calculator

:addition
set "operation=add"
goto input

:subtraction
set "operation=sub"
goto input

:multiplication
set "operation=mul"
goto input

:division
set "operation=div"
goto input