shell中读取文件后的变量不能传递出来吗？
在list里有一组数字，我要判断每行数字的大小，然后输出个数，但是我读完后，发现count的变量传递不出来，这是怎么回事？
#!/bin/bash
if [ "$2" == "" ]; then
echo 'Usage:' $0 '<trj.xyz> <newtrj.xyz>'
exit 0
fi
firstend=24
secondend=108
thirdend=368
count1=0
count2=0
count3=0
cat list | while read line
do
if [[ $line .le. $firstend ]] && [[ $line .ge.1 ]]
then
count1=$(($count1+1))
elif [[ $line .gt. $firstend ]] && [[ $line .le. $secondend ]]
then
count2=$(($count2+1))
else
count3=$(($count3+1))
fi
done
echo "the first shell has '$(($firstend-$count1))' atoms"
echo "the second shell has '$(($secondend-$firstend-$count2))' atoms"
echo "the third shell has '$(($thirdend-$secondend-$firstend-$count3' atoms"
[解决办法]
试试
while read line
do
...
done < list
[解决办法]
source 脚本
[解决办法]
管道引起sub shell
