输出第5行的内容
输出第5行的内容
https://www.nowcoder.com/practice/1d5978c6136d4252904757b4fa0c9296?tpId=195&rp=1&ru=%2Fexam%2Foj&qru=%2Fexam%2Foj&sourceUrl=%2Fexam%2Foj%3Ftab%3DSHELL%25E7%25AF%2587%26topicId%3D195&difficulty=&judgeStatus=&tags=&title=&gioEnter=menu
j=0
for i in `cat nowcoder.txt`do
if [ $j -eq 4 ];then
echo $i
fi
let j++
done