China DOS Union

How can I read the numbers from a txt file in cmd and assign them to variables?

Seeking advice, thank you

This depends on the format of your TXT file.

How to say?

There is only one line of numbers in this txt file

For example.
It needs to be analyzed specifically for specific problems.

I want to let cmd judge the date and execute a specific command after the specified date.

My cmd will judge whether tmp.txt exists when it runs for the first time. If not, it will generate a number (such as 20070320) of the current date and save it in this tmp.txt file. Then every time cmd runs, it will judge whether a certain date (such as 15 days) has passed. If it is greater than 15 days, it will prompt "XXXXX!". My code is as follows

@Echo Off
set tm1=%date:~0,4%
set tm2=%date:~5,2%
set tm3=%date:~8,2%
set /a number=%tm1%*365+%tm2%*30+%tm3%
if not exist %windir%:\tmp.txt echo %number%>%windir%:\tmp.txt & goto end
goto begin

:begin
if .....Here it involves how to read the value in the txt and compare it with the number converted from the current date, I don't know.

:end

Ask the expert, thank you

Give it a bump, looking forward to it......

Or there are other ways to achieve this purpose, that's fine too

>txt
set/p

or

for ... do (set ...)

for /f "usebackq tokens=*" %i in ("%windir%\tem.txt") do ..
You can use this method to read the numbers from the txt.

```
@echo off
set/p St=<tmp.txt
echo %St%
pause&exit/b
```

Thanks, but can you explain what it means?

set/p St=<tmp.txt This line

Assign the first line of the tmp.txt file to the St variable.

Thanks to the brother upstairs!!! But I have ransacked the help documentation of set and can't find this usage.

I'm currently sharing my code to offer some help to brothers in need:

@Echo Off
set tm1=%date:~0,4%
set tm2=%date:~5,2%
set tm3=%date:~8,2%
set /a number=%tm1%*365+%tm2%*30+%tm3%
if not exist c:\tmp.txt echo %number%>c:\tmp.txt & exit
goto begin

:begin
set /p St=<c:\tmp.txt
set /a number2=%number%-%St%
if %number2% gtr 15 echo 你的使用期限已过15天& pause & exit
echo 您还在使用期，请继续使用
pause & exit

Originally posted by wjgyz740526 at 2007-3-23 12:34:
Thank you, brother above!!! But I have ransacked the help documentation of set and can't find this usage.

Many usages are explored by people, and it may not be in the help.