摒弃 for 循环
打印字母数小于8的单词
https://www.nowcoder.com/practice/bd5b5d4b93a04226a81afbabf0be797d
#!/bin/bash
# echo "how they are implemented and applied in computer systems systemsa" | sed 's/ /\n/g' | awk '/^.{1,7}$/'
cat nowcoder.txt | sed 's/ /\n/g' | awk '/^.{1,7}$/'
既然题目说了不用担心空格和换行, 那咱们肯定不能用 awk 的 for 循环了, 那样多难看
