在什么情况下使用八进制基数? [英] In what situations is octal base used?

问题描述

我已经看到二进制和十六进制经常使用，但从未使用过八进制.但是八进制在某些语言中有其自己的约定(即，以0开头的数字表示八进制基数).什么时候使用八进制?当人们使用八进制或八进制更容易推理时，有哪些典型情况?还是仅仅是口味问题?

I've seen binary and hex used quite often but never octal. Yet octal has it's own convention for being used in some languages (ie, a leading 0 indicating octal base). When is octal used? What are some typical situations when one would use octal or octal would be easier to reason about? Or is it merely a matter of taste?

推荐答案

Octal用作表示UNIX系统上文件权限的简写.例如，文件模式rwxr-xr-x将为0755.

Octal is used as a shorthand for representing file permissions on UNIX systems. For example, file mode rwxr-xr-x would be 0755.

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