在批处理文件中定义和使用变量

本文翻译自：Defining and using a variable in batch file

I'm trying to define and use a variable in a batch file. 我正在尝试在批处理文件中定义和使用变量。 It looks like it should be simple: 看起来应该很简单：

@echo off

set location = "bob"
echo We're working with "%location%"

The output I get is the following: 我得到的输出如下：

We're working with ""

What's going on here? 这里发生了什么？ Why is my variable not being echo'd? 为什么我的变量没有被回显？

---

#1楼

参考：https://stackoom.com/question/iHGe/在批处理文件中定义和使用变量

---

#2楼

The space before the = is interpreted as part of the name, and the space after it (as well as the quotation marks) are interpreted as part of the value. =之前的空格被解释为名称的一部分，而其后面的空格（以及引号）被解释为值的一部分。 So the variable you've created can be referenced with %location % . 因此，您创建的变量可以用%location %引用。 If that's not what you want, remove the extra space(s) in the definition. 如果这不是您想要的，请删除定义中的多余空间。

---

#3楼

The spaces are significant. 空间很大。 You created a variable named 'location ' with a value of 您创建了一个名为'location '的变量，其值为
' "bob"' . ' "bob"' 。 Note - enclosing single quotes were added to show location of space. 注意-添加了单引号以显示空间位置。

If you want quotes in your value, then your code should look like 如果要在值中加上引号，则代码应如下所示

set location="bob"

If you don't want quotes, then your code should look like 如果您不想使用引号，那么您的代码应如下所示

set location=bob

Or better yet 还是更好

set "location=bob"

The last syntax prevents inadvertent trailing spaces from getting in the value, and also protects against special characters like & | 最后一种语法可防止无意中使用尾随空格来获取值，还可以防止特殊字符（例如& | etc. 等等

---

#4楼

input location.bat 输入location.bat

@echo off
cls

set /p "location"="bob"
echo We're working with %location%
pause

output 输出

We're working with bob

(mistakes u done : space and " " ) （您所做的错误： space和" " ）