命令行参数,标准aproach解析? [英] Command line parameters, standard aproach to parse?

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问题描述

我一直在读一些关于程序如何处理命令行参数。但是信息似乎是不完整,我读过的东西:

I've been reading a bit about how programs handle command line parameters. But the information seems to be "incomplete", things I've read:


  • 选项可能有一个前面的' - '或'如果他们的前面。

  • 选项可以有其他参数(不带 - 符号)

  • 选项参数直接跟随选项,有或没有空格。 / li>
  • 选项可以是单个字母或全字。

  • 选项可以合并到单个选项中:-abc equals -a -b - c

  • Options may have a preceding '-' or '/' sign if front of them.
  • Options can have additional arguments (which go without a - sign)
  • the option arguments follow the option directly, with or without a space.
  • Options can be a single letter or a full word.
  • optionscan be merged inside a single "option": -abc equals -a -b -c

(来源)

现在我真的想知道:什么样的选项你给一个 -
也将选项合并为1似乎与全字选项不兼容? -file可以是一个完整的字,但它也可能意味着-f,-i,-l,-e,4个不同的开关。

Now I'm really wondering: What kind of options do you give a "-" sign and which not. Also the merging of options into 1 seems to be incompatible with full-word options? "-file" can be a full word, but it might also mean "-f", "-i", "-l", "-e", 4 different switches. Or even: "-f" with "ile" as option_argument.

我理解错了吗?

推荐答案

在像Linux这样的系统上,有一个约定:全字的选项使用两个破折号(例如 - file -letter选项使用单个破折号(例如 -f 。)

On systems like Linux, there is the convention that options that are full words use two dashes (e.g. --file), while single-letter options use a single dash (e.g. -f.)

使用斜杠引入选项是来自旧DOS ,并保存在Windows中。

Using slash to introduce options is from old DOS, and is being kept in Windows.

此外,如果某个选项使用整个单词,则无法分割为多个选项。这是关于你的例子 -file -file 可以是一个选项,不同的选项( -f -i -l <​​/ code>和 -e )。

Also, if an option is using a whole word, it can not be split into several options. This is in regards to your example with -file: -file can either be one option, or four different options (-f, -i, -l and -e).

我建议你找一些你喜欢的方式,然后使用。

I would suggest you find some way you like, and then use that.

这篇关于命令行参数,标准aproach解析?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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