中国DOS联盟

:0
@echo off&setlocal enabledelayedexpansion
if not exist 1.txt echo 不存在1.txt,请将要处理的内容存为1.txt文本&pause&exit
for /f %%i in (1.txt) do (
set /a x+=1
call :1 "%%i" x!x!
set name=!name! x!x!
)
for %%j in (%name%) do (
for /l %%i in (1,1,%n%) do set /p=!%%j_%%i! <nul
echo.
)

echo.&echo.
set /p oo=输入指定的数进行上下行截取:

for /l %%i in (1,1,10) do (
for %%j in (%name%) do (
if defined x_x set ok%%j_%%i=!%%j_%%i!
if !%%j_%%i! equ %oo% (call set ok!_tmp!=%%!_tmp!%%) else (
if not defined ok!_tmp! call set ok!_tmp!= )
set x_x=&set _tmp=
if !%%j_%%i! equ %oo% (set x_x=x&set ok%%j_%%i=!%%j_%%i!) else (
set _tmp=%%j_%%i
)
)
set x_x=
)
for %%j in (%name%) do (
for /l %%i in (1,1,10) do set /p=!ok%%j_%%i! <nul
echo.
)

pause
exit
:1
set xx=%~1
set n=0
:2
set /a n+=1
if "%xx%" gtr "" (set %~2_%n%=%xx:~0,1%&set xx=%xx:~1%&goto 2) else (goto :eof)
goto :eof


谁能告诉我 下面 每行的意思 和 这些符号的作用 特别是在判断语句