中国DOS联盟

@echo off
setlocal enabledelayedexpansion
::::::::::::::::::::::::::::Find The Biggest Public Divisor::::::::::::::::::::::::::::
::::::::::::::::::::::::::::       {s11ss  2007-9-21}       ::::::::::::::::::::::::::::
:r
echo Please input two integers,like 9,21:
set /p n=
echo.
echo Calculating...
set /a i=1
for %%a in (!n!) do (
	set n!i!=%%a
	set /a i+=1
)
if !n1! equ !n2! (
	call :e !n1!
	goto :eof
)
if !n1! lss !n2! (
	set t=!n1!
	set n1=!n2!
	set n2=!t!
)
set /a big=!n1!
set /a small=!n2!
:c
set /a remain=!big!%%!small!
if !remain! equ 1 (
	echo.
	echo They don't have the public divisor.
	goto :e
)
if !remain! equ 0 (
	echo.
	echo The biggest public divisor is !small!.
	goto :e
) else (
	set big=!small!
	set small=!remain!
	goto :c
	)
:e
echo.
echo Press Any Key To Exit...
pause>nul

@echo off 2>nul 3>nul& setlocal enabledelayedexpansion
echo 请输入几个整数，类似：21 7 14
set /p n=
set num2=%n:* =%
for %%i in (%n%) do call :test %%i !num2!
echo 它们的公约数为：%num2%

pause>nul
:test %num1% %num2%
set /a temp=%1 %% %2
if %temp% NEQ 0 (
      set/a num1=%2,num2=%temp%
      call :test !num1! !num2!) else set num2=%2