题解 | #打印每一行出现的数字个数#
打印每一行出现的数字个数
https://www.nowcoder.com/practice/2d2a124f98054292aef71b453e705ca9
#/bin/bash idx=1 sum=0 while read line;do num=`echo $line | grep -o [1-5] | wc -l|awk '{print $1}'` #awk的作用是去掉wl -l后的多余空白 echo "line$idx number:$num" let idx=$idx+1 let sum=$sum+$num done<nowcoder.txt echo "sum is"$sum