你可以使用call来克服环境变量被太快求值的问题。

set A=Hello & call echo %A%

文档中的一段话:

来源:微软，Windows XP专业产品文档，命令shell概述 另外:Windows CMD命令的A-Z索引

Using multiple commands and conditional processing symbols You can run multiple commands from a single command line or script using conditional processing symbols. When you run multiple commands with conditional processing symbols, the commands to the right of the conditional processing symbol act based upon the results of the command to the left of the conditional processing symbol. For example, you might want to run a command only if the previous command fails. Or, you might want to run a command only if the previous command is successful. You can use the special characters listed in the following table to pass multiple commands. & [...] command1 & command2 Use to separate multiple commands on one command line. Cmd.exe runs the first command, and then the second command. && [...] command1 && command2 Use to run the command following && only if the command preceding the symbol is successful. Cmd.exe runs the first command, and then runs the second command only if the first command completed successfully. || [...] command1 || command2 Use to run the command following || only if the command preceding || fails. Cmd.exe runs the first command, and then runs the second command only if the first command did not complete successfully (receives an error code greater than zero). ( ) [...] (command1 & command2) Use to group or nest multiple commands. ; or , command1 parameter1;parameter2 Use to separate command parameters.

您可以使用&来一个接一个地运行命令。示例:c:\dir & vim myFile.txt

在windows中，我使用了上述所有解决方案&，&&，但都不起作用 ';'符号终于为我工作了

npm install; npm start

当您尝试在一行中使用或操作变量时，请注意它们的内容!例如，如下所示的变量

PATH=C:\程序文件(x86)\某处;“C: \企业\酷工具”;% USERPROFILE % \ AppData \当地\ \ WindowsApps微软;

可能会导致很多无法处理的麻烦，如果你使用它作为%PATH%

右括号终止组语句 双引号不允许使用%PATH%来处理圆括号问题 像%USERPROFILE%这样的引用变量将包含什么?

再举一个例子:例如，当我们使用gulp构建系统时，而不是

Gulp -默认>构建

Gulp构建-构建构建文件夹

Gulp watch -开始文件监视

Gulp dist- build dist-folder

我们可以用一行代码来实现:

cd c:\xampp\htdocs\project & gulp & gulp watch