读取文件

1、for

function for_read_file()
{
        file=$1
        for  line in `cat $file`
        do
                echo $line
        done
}

for_read_file test.txt

2、while

function while_read_file()
{
        file=$1
        while read line
        do
                echo $line
        done < $file
}

while_read_file test.txt