Variables 在批处理中向时间添加分钟数（使用算术）

我陷入了进退两难的境地。我想向用户发送一封先发制人的电子邮件，告诉他们即将发生的任务。为了做到这一点，我定义了一些变量，通过blat发送一封电子邮件，将批处理休眠5分钟，然后执行脚本的其余部分

在下午4:00执行

%time%

时，我得到16:00:00.00。如果我在电子邮件中添加5分钟，仅用于显示，代码如下：

@echo on
SET /a timeminute = 00 + 5 << --- test code
::SET /a timeminute = %time:~3,2% + 5 << --- actual code in GoLive
IF %timeminute% LEQ 9 (
    GOTO :resetTime
) ELSE (
    GOTO :end
)
:resetTime
SET timeminute = "0%timeminute%"

:end
echo %timeminute%
pause

@echo on
SET/a timeminute=00+5用以下内容回答了我自己的问题：

@echo on
setlocal enabledelayedexpansion

set timehour=%time:~0,2%
set timeminute=%time:~3,2%
set timeseconds=%time:~6,2%
set addTime=5
IF %timeminute:~0,1% lss 1 set timeminute=!timeminute:~1,1!
IF %timeminute:~0,1% lss 1 set timeminute=!timeminute:~1,1!
set /a timeminute=%timeminute% + %addTime%
IF %timeminute% lss 10 set timeminute=0!timeminute!

IF %timeminute% equ 60 (
set timeminute=00
set /a timehour=%timehour% + 1
)

IF %timeminute% equ 61 (
set timeminute=01 
set /a timehour=%timehour% + 1
)

IF %timeminute% equ 62 (
set timeminute=02 
set /a timehour=%timehour% + 1
)

IF %timeminute% equ 63 (
set timeminute=03
set /a timehour=%timehour% + 1
)

IF %timeminute% equ 64 (
set timeminute=04
set /a timehour=%timehour% + 1
)

IF %timehour% equ 25 (
set timehour=00
)

IF %timehour% lss 10 set timehour=0!timehour!

echo %timehour%:%timeminute%:%timeseconds%
pause

做同样事情的更紧凑的形式是：

@echo on
for /F "tokens=1-3 delims=:." %%a in ("%time%") do (
   set timeHour=%%a
   set timeMinute=%%b
   set timeSeconds=%%c
)
rem Convert HH:MM to minutes + 5
set /A newTime=timeHour*60 + timeMinute + 5
rem Convert new time back to HH:MM
set /A timeHour=newTime/60, timeMinute=newTime%%60
rem Adjust new hour and minute
if %timeHour% gtr 23 set timeHour=0
if %timeHour% lss 10 set timeHour=0%timeHour%
if %timeMinute% lss 10 set timeMinute=0%timeMinute%
echo %timeHour%:%timeMinute%:%timeSeconds%
pause