[已解决]批处理如何将文本每两行合并为一行输出到新的文本里？

ams

文本如下

1. aaaaaaaa
   
2. bbbbbbbb
   
3. cccccccccc
   
4. dddddddd
   

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请教如何变成如下

1. aaaaaaaa bbbbbbbb
   
2. cccccccccc dddddddd
   

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判断时不能写死数字，例子的4行内容为示范，真实文本行数不固定

gawk

1. sed "$!N;s/\n/ /" 1.txt > 2.txt
   

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gawk

1. gawk "NR%2{printf $0" ";next}1"  1.txt > 2.txt
   

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gawk

1. @echo off
   
2. set "MergeRows=2"
   
3. (for /f  %%a in (1.txt) do (
   
4.     set /a n+=1
   
5.     set /a m=n%%%MergeRows%
   
6.     set /p=%%a <nul
   
7.     set /a test=1/m 2>nul || echo;
   
8. ))>2.txt

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pcl_test

1. @echo off
   
2. (for /f "delims=" %%a in ('type "a.txt"') do (
   
3.     if not defined n (set/p"=%%a "&set n=1) else (echo;%%a&set n=)
   
4. ))<nul>"b.txt"
   
5. pause

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ams

感谢gawk和pcl_test