windows 7批处理脚本 - 如果语句不起作用

Question

cd C:\Users\user1\Desktop

if "%time:~0,1%" == " "
ren 85.txt %time:~1,1%.txt 
else ren 85.txt %time:~o,1%.txt 

pause 

上面的脚本无效，但如果我将以下行放入文件中：

ren 85.txt %time:~1,1%.txt 

它正在运作。

为什么上面的if...else声明不起作用？

Answer 1

cd C:\Users\user1\Desktop

if "%time:~0,1%" == " " (
 ren 85.txt %time:~1,1%.txt 
) else (
   ren 85.txt %time:~0,1%.txt 
)

pause 

您需要括号或一行if语句：if "%time:~0,1%" == " " ren 85.txt %time:~1,1%.txt

Answer 2

o不起作用，请使用0（零）尝试：

cd C:\Users\user1\Desktop

if "%time:~0,1%"==" " (ren 85.txt %time:~1,1%.txt 
) else ren 85.txt %time:~0,1%.txt 

pause