将变量设置为等于文本文件批处理中的数字 [英] Set variable equal to a number in a text file Batch

问题描述

我有一个批处理文件( tickets.bat )，每次创建不同的票证时，通过设置多个变量并将这些变量回显到文本文件中，我希望票证号增加我尝试通过创建一个 number.txt 文件来实现此目的，并且每次您遍历循环并创建新票证时，都会将％pnumber％设置为文本文件，然后将％number％设置为％pnumber％加1.但是，即使 number.txt 文件包含数字1，并且保持不变.这就是我所拥有的:

I have a batch file (tickets.bat) and each time you create a different ticket, by setting multiple variables and echoing the variables to a text file, I want the ticket number to go up by 1. I tried to do this by creating a number.txt file and each time you go through the loop and create a new ticket, it sets %pnumber% to the text file, and then sets %number% to %pnumber% plus 1. But %pnumber% keeps setting to 0, even when the number.txt file contains the number 1 and doesn't change. This is what I have:

:start
cls
echo Enter Ticket Info Here:
set /p name="Name:"
echo Press Enter to Show Ticket Preview
set /a pnumber=C:\Batch\ticket\number.txt
set /a number=%pnumber%+1
echo %number% > "C:\Batch\ticket\number.txt"
echo %name% Ticket Number %number%
pause
goto start

看来我的问题是％pnumber％始终设置为0.除非我缺少其他内容.基本上，我需要它始终将％number％增加1，即使您关闭了Batch作业并再次将其打开，所以这就是为什么我要使用 .txt 文件.在文本文件中看不到数字吗?它是一行上的一个数字.谢谢.

It looks like my problem is that %pnumber% always sets to 0. Unless I'm missing something else. Basically, I need it to always increase %number% by 1, even if you close the Batch job and open it up again, so that's why I went to using a .txt file. Is it not seeing the number in the text file or something? It's one number on one line. Thank you.

推荐答案

像这样尝试:

@echo Off
:start
cls
echo Enter Ticket Info Here:
set /p name="Name:"
echo Press Enter to Show Ticket Preview
set /p pnumber=<C:\Batch\ticket\number.txt
set /a number=%pnumber%+1
echo %number% >C:\Batch\ticket\number.txt
echo %name% Ticket Number %number%
pause
goto start

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