[文本处理] 求助批处理利用if控制for循环处理文本错在哪里？

@echo off
setlocal enabledelayedexpansion
set t1=D8888D贴子标题-------------------------------------------------------
set t3=D8888D主贴内容-------------------------------------------------------
for %%i in (*.txt) do (
  set /p t= < %%i
  if not "!t!"=="%t1%" (
    (echo %t1%&echo !t!&echo %t3%&type "%%i")>file.tmp
    move file.tmp "%%i"
  )
)
复制代码

@echo off
setlocal enabledelayedexpansion

set t1=D8888D贴子标题-------------------------------------------------------
set t3=D8888D主贴内容-------------------------------------------------------
set t=
rem set /a sum=0

for %%i in (*.txt) do (
set /p t= < %%i
echo !t!
pause
if !t! neq %t1% (
echo %t1% > file.tmp
echo !t! >> file.tmp
echo %t3% >> file.tmp
type "%%i" >> file.tmp
del /f /q "%%i"
ren file.tmp "%%i"
)else(echo 该文件已有标签！&pause)
)
pause
exit
复制代码

@echo off
setlocal enabledelayedexpansion
set "t1=D8888D贴子标题-------------------------------------------------------"
set "t3=D8888D主贴内容-------------------------------------------------------"
set "fl=file.tmp"
for %%i in (*.txt) do (
  set /p t=<"%%i"
  if /i not "!t!"=="%t1%" (
    >%fl% echo %t1%
    >>%fl% echo !t!
    >>%fl% echo %t3%
    >>%fl% type "%%i"
    move /y %fl% "%%i"
  ) else (echo 该文件已有标签！)
)
pause
复制代码