#/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