linux shell实现求一个多维数组中的最大和最小值

#! /bin/bash
echo "the file is :"
cat 99shu
max=0
min=999999
line=1
dnum=$(cat 99shu| wc -l)
while (($line=$dnum))
do
for i in $(cat 99shu|head -"$line")
    do
  ((max$i))max=$i
    ((min>$i))min=$i
    done
let ++line
done
 
echo "the max number is: $max"
echo "the min number is : $min"

#! /bin/bash
# echo the MAX and the MIN

echo "the numbers is:"
cat 99shu
mnum=0
min=99999
while  read line 
do
declare -a arr=($line)
lnum=$(echo $line | wc -w)
i=0
while (( $i$lnum ))
do
(($mnum${arr[i]}))  mnum=${arr[i]}
(($min>${arr[i]}))  min=${arr[i]}
let ++i
done
done  99shu
echo "the max number is $mnum"
echo "the min number is $min"

#! /bin/bash
echo "the MAX number is: $( cat 99shu | awk '{for(i=1;i=NF;i++)if(max$i) max=$i;print max}'|tail -1)"
echo "eht MIN number is: $( cat 99shu | awk '{min=999999;for(i=1;i=NF;i++)if(min>$i)min=$i;print min}'|sort|head -1 )"

#!/bin/bash
min=$(cat  99shu | tr "\t" "\n"|tr " " "\n"|sort -n|uniq|grep -v "^$"|head -1)
max=$(cat  99shu | tr "\t" "\n"|tr " " "\n"|sort -n|uniq|grep -v "^$"|tail -1)
echo "The MAX number is $max"
echo "The MIN number is $min"