[文本处理] 用批处理怎么实现进度条显示？

@echo off
setlocal enabledelayedexpansion
color 0a
mode con: cols=80 lines=30
title Code By GaryNg--Loading Bar Module
set "clr=set bk="
set "kuang=set /p=[                                        ]<nul"
set "ping=ping -n 1 127.1 >nul 2>nul"
set "done=set /p=]Done<nul&echo\"
set "kuang1=set /p=[::::::::::::::::::::::::::::::::::::::::]<nul"
::1
echo\&echo 1: An Easy Loading Bar&echo\&echo\&echo\&echo\
%kuang%
call :BK 40
set /p=!bk!^|<nul
for /l %%i in (1 1 39) do (
	set /p=^|<nul
%ping%
)
%done%
pause
cls
::2
echo\&echo 2: Sliding Loading Bar&echo\&echo\&echo\&echo\
%kuang%
call :BK 36
set /p=!bk!^<==^><nul
%ping%
call :BK 3
for /l %%i in (1 1 32) do (
		set /p=!bk! ^<==^><nul
%ping%	
)
%done%
pause
cls
::3
echo\&echo 3: Go and Back Loading Bar&echo\&echo\&echo\&echo\
%kuang%
call :BK 36
set /p=!bk!%cur%<nul
%ping%
call :BK 3
for /l %%i in (1 1 36) do (
		set /p=!bk! ^<==^><nul
%ping%	
)
call :BK 5
set /p=!bk!^<==^>  <nul
%ping%
for /l %%i in (1 1 35) do (
	set /p=!bk!^<==^> <nul
%ping%
)
set /p=                                   ]Done<nul
echo\
pause
cls
::4
echo\&echo 4: Spining Loading&echo\&echo\&echo\&echo\
%kuang%
call :BK 40
set /p=!bk!<nul
%clr%
set b=/-\ /-\ **
:b
for /l %%i in (0,1,390) do call :a %%i
goto :c
:a
set/a a=%1%%10
set/a c=%a%%%4
if %a% EQU 0 set/p=.<nul
if %c% EQU 3 (set/p=^|<nul) else (set/p=!b:~%a%,1!<nul)
set/p=!bk!<nul
goto :eof
:c
%done%
pause
cls
::5
echo\&echo 5: Backward Loading Bar&echo\&echo\&echo\&echo\
%clr%
%kuang%
set bk=!bk!
for /l %%i in (1 1 40) do (
	set /p=!bk!^|<nul
	%ping%
)
echo\
echo Done
pause
cls
::6
echo\&echo 6. "Under Tunnel" Loading Bar&echo\&echo\&echo\&echo\
call :SP 40
set /p=[!sp!]<nul

call :BK 36
set /p=!bk!<nul
%ping%
call :BK 3
for /l %%i in (1 1 36) do (
		set /p=!bk! ::::<nul
%ping%	
)
call :BK 39
call :SP 36
set /p=!bk!:!sp!<nul
%ping%
call :BK 35
call :SP 36
for /l %%i in (1 1 3) do (
	%ping%
	set /p=!bk!:!sp!<nul
)
call :BK 35
set /p=!bk!<nul
call :BK 3
for /l %%i in (1 1 36) do (
	set /p=!bk! ::::<nul
	%ping%	
)
%done%
pause
cls
::7
echo\&echo 7. Go Towards Center Loading Bar&echo\&echo\&echo\&echo\
%kuang%
for /l %%i in (1 1 20) do (
	set c=
	set s=
	set /a c=42-2*%%i
	set /a s=!c!-2
	call :BK !c!
	call :SP !s!
	set /p=!bk!^|!sp!^|<nul
	%ping%
)
set /p=Done<nul
echo\
pause
cls
::8
echo\&echo 8. Replace To Load&echo\&echo\&echo\&echo\
%kuang1%
call :BK 40
set /p=!bk!^|<nul
for /l %%i in (1 1 39) do (
	set /p=^|<nul
%ping%
)
%done%
pause&exit
:SP
set sp=
for /l %%i in (1 1 %1) do (
	set sp=!sp! 
)
goto :eof

:BK
%clr%
for /l %%i in (1 1 %1) do (
	set bk=!bk!
)
goto :eof
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