China DOS Union

----------------------
aaa bbb

[abcd]
aaa bbb
cc dd
---------------------

```
@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (1.txt) do (
set str=%%i
if "!str!" equ "" (
echo.&echo !str!
) else (
echo !str!
)
)
pause>nul
```

Can the "" be replaced with something universal? Because there are also , , etc. How to obtain "

I found a more concise one:
@echo off for /f "delims=" %%i in (1.txt) do ( if %%i== echo. echo %%i ) pause>nul

```
@echo off
for /f "delims=" %%a in (a.txt) do (
if "%%a"=="" echo.
echo %%a
)
pause
```

Oh, after posting, I found out I'm on the 5th floor. I thought I was on the 3rd floor? It's exactly the same as the 4th floor. Haha...

I'm still missing four quotation marks, heh heh........

[abcd] This is not just one, there are also [efgh], [ijk] and so on. If there are dozens of []s, it's too cumbersome to add them one by one.

The situation mentioned by the person upstairs still needs to be analyzed on a case-by-case basis.

Can't we just make a judgment based on [? If there is [, leave a blank line above it

If the first character of the line is '
@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (1.txt) do (
set "str=%%i"
if "!str:~0,1!"=="




[ Last edited by WANKOILZ on 2008-5-29 at 09:22 PM ]

```@echo off
for /f "delims=" %%i in (1.txt) do (
echo %%i|findstr "^$">nul&&echo.
echo %%i
)
pause>nul

Originally posted by zqz0012005 at 2008-5-29 21:24:
@echo off for /f "delims=" %%i in (1.txt) do ( echo %%i|findstr "^$">nul&&echo. echo %%i ) pause>nul

Hehe, the one upstairs really has an efficiency problem.

Originally posted by 26933062 at 2008-5-29 09:35 PM:

Hehe, the one upstairs really has an efficiency issue.

That one I tried doesn't work at all.

There is another question. If there are spaces in front of each line, also delete them?

aaaaaaa
bbbbbbbbb
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aaaaaaa
bbbbbbbbb