关于Unix命令"wc".什么是单词? [英] Regarding the Unix command "wc" what is considered as a word?

问题描述

命令wc提供lineCount，wordCount和charCount.我正在编写一个模拟wc命令的程序，因为它需要一个文件并吐出3个属性.行数很容易，因为如果它看到\n，它将为++lineCount；如果存在一个字符且它不是EOF，则它将为++charCount.但是单词是什么意思呢?是什么分隔单词，空格?

The command wc provides lineCount, wordCount, and charCount. I am writing a program that simulates the wc command as it takes a file and spits out the 3 properties. Line count is easy because if it sees \n it will ++lineCount and if a char exists and it's not EOF, it will ++charCount. But what does word mean? What separates words, whitespace?

推荐答案

这是由POSIX指定:

wc 实用程序应将单词视为由空格分隔的非零长度字符串.

The wc utility shall consider a word to be a non-zero-length string of characters delimited by white space.

我的系统(Ubuntu 17.04)上wc的手册页类似:

The man page for wc on my system (Ubuntu 17.04) is similar:

单词是由空格分隔的非零长度字符序列.

A word is a non-zero-length sequence of characters delimited by white space.

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