如何使用shell命令计算文件中每个句子的单词数？

Question

我有这样的文本文件：

Mr.P.K.Baneerjee has visited the site today at 4.30pm
The permit tag has been set in the ds busbar
Opearation has been performed in presence of control engineer
Opeation was successfully completed

所有文件只有四行

只有单词数必须作为输出打印，就像这样：

8
10
9
4

Answer 1

你可以这样做：

awk '{print NF}' filename