[日期时间] 取前一天日期建文件夹名的批处理为何出错？

@echo on
setlocal enabledelayedexpansion
set curr_year=%date:~0,4% 
set curr_month=%date:~5,2%  
set curr_day=%date:~8,2%

if %curr_month:~0,1%==0 set curr_month=%curr_month:~1,1% 
if %curr_day:~0,1%==0 set curr_day=%curr_day:~1,1% 

set last_year=%curr_year% 
set tmp_last_month=%curr_month%
set /a tmp_last_day=%curr_day%-1  

if %tmp_last_day%==0 set /a tmp_last_month=%curr_month%-1 

if !tmp_last_day!==0 (
if !tmp_last_month!==0 (
set last_day=31
goto final
)  
if !tmp_last_month!==1 (
set last_day=31
goto final
)  
if !tmp_last_month!==2 (
goto leap_year
)  
if !tmp_last_month!==3 (
set last_day=31 
goto final  
)  
if !tmp_last_month!==4 (
set last_day=30
goto final  
)  
if !tmp_last_month!==5 (
set last_day=31 
goto final  
)  
if !tmp_last_month!==6 (
set last_day=30 
goto final 
)  
if !tmp_last_month!==7 (
set last_day=31 
goto final  
)  
if !tmp_last_month!==8 (
set last_day=31 
goto final  
)  
if !tmp_last_month!==9 (
set last_day=30 
goto final 
)  
if !tmp_last_month!==10 (
set last_day=31  
goto final  
)  
if !tmp_last_month!==11 (
set last_day=30
goto final  
)  
) else (goto :final)

:leap_year
set leapyear_flag=0  
set /a isleapyear=%curr_year%%%4  
if %isleapyear%==0 set leapyear_flag=1 
set /a isleapyear=%curr_year%%%400  
if %isleapyear%==0 set leapyear_flag=1 
set /a isleapyear=%curr_year%%%100  
if %isleapyear%==0 set leapyear_flag=0 
set tmp_last_day=28  
if %leapyear_flag%==1 set tmp_last_day=29 


:final
if %tmp_last_month%==0 (
set /a last_year=%curr_year%-1
set last_month=12
)

set last_month=%temp_last_month%
if %tmp_last_month%==1 set last_month=01 
if %tmp_last_month%==2 set last_month=02 
if %tmp_last_month%==3 set last_month=03 
if %tmp_last_month%==4 set last_month=04 
if %tmp_last_month%==5 set last_month=05 
if %tmp_last_month%==6 set last_month=06 
if %tmp_last_month%==7 set last_month=07 
if %tmp_last_month%==8 set last_month=08 
if %tmp_last_month%==9 set last_month=09 

set last_day=%tmp_last_day%
if %tmp_last_day%==1 set last_day=01 
if %tmp_last_day%==2 set last_day=02 
if %tmp_last_day%==3 set last_day=03 
if %tmp_last_day%==4 set last_day=04 
if %tmp_last_day%==5 set last_day=05 
if %tmp_last_day%==6 set last_day=06 
if %tmp_last_day%==7 set last_day=07 
if %tmp_last_day%==8 set last_day=08 
if %tmp_last_day%==9 set last_day=09

set dt=%last_year:~0,4%-%last_month:~0,2%-%last_day:~0,2% 

md d:\%dt%
复制代码