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
http://www.nowcoder.com/practice/2d2a124f98054292aef71b453e705ca9
line=`cat nowcoder.txt | wc -l`
u='0'
for ((i=1;i<=$line;i++));do
num1=`sed -n ''$i'p' nowcoder.txt`
num2=`sed -n ''$i'p' nowcoder.txt | tr -d [12345]`
num=`expr ${#num1} - ${#num2}`
echo line$i" "number:$num
u=`expr $u + $num`
done
echo sum is $u
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