zh_1452

@echo off
set str=今日明月在
set var=%str:~0,3%
type nul>f:\1.txt
echo %str:~0,2%>f:\1.txt&&type f:\1.txt
pause
@echo off
::不好意思把字符分开截取FOR
set str=今日,明月,在
type nul>f:\2.txt
set var=%str:~-4%
echo %str:~-4%
echo %str:~-4%>f:\2.txt&&type f:\2.txt
echo var=2.txt
if exist f:\2.txt (echo F盘下有2.txt存在) else (echo f盘下没有2.txt存在)
for /f %%i in (f:\2.txt) do echo %%i
for /f "delims=," %%i in (f:\2.txt) do echo %%i
pause
@echo off
set str=明月,在
set var=%str:~0,2%
echo %str:~0,2%
type nul>f:\3.txt
echo %str:~0,2%>f:\3.txt&&type f:\3.txt
@echo off
set str=明月,在
set var=%str:-1%
echo %str:~-1%
type nul>f:\4.txt
echo %str:~-1%>f:\4.txt&&type f:\4.txt
pause
@echo off
type f:\1.txt>>f:\3.txt
type f:\4.txt>>f:\3.txt
type f:\3.txt
pause
复制代码

@echo off
::好累
pause
复制代码