1.Count the lines in .c files in a working directory and all its subdirectories

#!/bin/bash

workspace=.
if [ "$#" -eq 1 ]
then
    $workspace=$1
fi

wc -l `find $workspace -name '*.c'` | tail -n -1 | cut -d " " -f 2

exit 0

2.Count the occurrences of the ten most frequent words in a file

#!/bin/bash

filename=$1

cat $filename | sort | uniq -c | sort -k1,1nr | head -10
8：30 -8：00， xz 9:00 10:30 [game p] , hh 7:30 9:00 [sport]
6 --> paper book
lt yxl
sz
mtlife chicken