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 "真好呀!!!"

setlocal  ENABLEDELAYEDEXPANSION

for /f %%a in (1.txt) do (

set str=%%a

set str=!str:^!=@!

echo !str!

pause)

set /?
Environment variable substitution has been enhanced as follows:

%PATH:str1=str2%

would expand the PATH environment variable, substituting each occurrence
of "str1" in the expanded result with "str2". "str2" can be the empty
string to effectively delete all occurrences of "str1" from the expanded
output. "str1" can begin with an asterisk, in which case it will match
everything from the beginning of the expanded output to the first
occurrence of the remaining portion of str1.

Originally posted by HAT at 2008-12-25 22:03:
把你的完整代码、详细问题描述更新到顶楼

@echo off

for /f "delims=" %%a in ('more +7^<%~fs0') do (

  set "str=%%a"

  call set "str=%%str:!=@%%"

  call echo.%%str%%

)

pause>nul&goto :eof

"真好呀!!!"