中国DOS联盟

I am too rubbish. Please find a batch script for automatic shutdown at a scheduled time:
Requirements:
1. When the computer starts, automatically detect whether it is morning or afternoon. If it is morning, set automatic shutdown at 12 o'clock. If it is afternoon, set automatic shutdown at 17 o'clock.
2. If the computer is started before 8 o'clock in the morning, between 12 o'clock and 13 o'clock, or after 17 o'clock in the evening, automatically shut down. Or cannot start?
Please help me, thank you in advance, dear experts!

Just use AT commands. You make it sound so complicated.

Can set scheduled shutdown and can query and change tasks: System Shutdown Management → VBS Version

@echo off

rem 开机自动检测是上午还是下午,是上午设定在12点自动关机.下午设定在17点自动关机.

rem 在上午8点以前,12点到13点,晚上17点以后开机自动关机..或者不能开机?

set t=%time:~0,2%

if %t% lss 8 (

  shutdown -s -t 0

) else if %t% geq 8 (

  if %t% lss 12 (

    at 12:00 shutdown -s -t 0

  ) else if %t% equ 12 (

    shutdown -s -t 0

  ) else if %t% geq 13 (

    if %t% lss 17 (

      at 17:00 shutdown -s -t 0

    ) else (

      shutdown -s -t 0

    )

  )

) 

The code was posted incorrectly, sweat, modify it.

@echo off

rem Automatically detect in the morning or afternoon at boot, if it's morning, set to auto - shutdown at 12 o'clock. If it's afternoon, set to auto - shutdown at 17 o'clock.

rem Before 8 o'clock in the morning, from 12 o'clock to 13 o'clock, and after 17 o'clock in the evening, auto - shutdown when booting.. Or can't boot?

set t=%time:~0,2%

if %t% lss 8 (

  shutdown -s -t 0

) else if %t% geq 8 (

  if %t% lss 12 (

    at 12:00 shutdown -s -t 0

  ) else if %t% equ 12 (

    shutdown -s -t 0

  ) else if %t% geq 13 (

    if %t% lss 17 (

      at 17:00 shutdown -s -t 0

    ) else (

      shutdown -s -t 0

    )

  )

) 

Last edited by HAT on 2007-6-13 at 09:13 PM ]

Thank you very much for the replies from the 3rd and 4th floors. I've learned something.

The `%time:~0,2%` is a substring extraction operation in batch scripting. In batch, for a variable that holds a time value, like `%time%`, the `~` is used for substring extraction. The syntax `%variable:~start,length%` means to extract a substring starting at position `start` with a length of `length`. Here, `%time:~0,2%` is extracting the first 2 characters from the `%time%` variable which represents the hour part of the time. So `set t=%time:~0,2%` is setting the variable `t` to the hour part of the current time.

The code on the 4th floor has been corrected.

Last edited by HAT on 2007-6-13 at 09:14 PM ]

```
//The part after : %time:~,0,2% I don't understand. Can you explain the parameters?

set t=%time:~0,2%
This means taking the first two digits of the current system time (that is, the hour value)

C:\>echo %time%
21:02:30.26

C:\>echo %time:~0,2%
21

Last edited by HAT on 2007-6-13 at 09:14 PM ]
```

It doesn't work when the system service isn't started