linux shell實現求一個多維陣列中的最大和最小值_linux shell

同事發了一道shell題，是求一個多維陣列中的最大和最小值
如檔案 99file：
 
33      55      23      56      99
234     234     545     6546    34
11      43      534     33      75
43      34      76      756     33
343     890     77      667     55

我的實現之一：

#! /bin/bashecho "the file is :"cat 99shumax=0min=999999line=1dnum=$(cat 99shu| wc -l)while (($line<=$dnum))dofor i in $(cat 99shu|head -"$line")    do  ((max<$i))&&max=$i    ((min>$i))&&min=$i    donelet ++linedone echo "the max number is: $max"echo "the min number is : $min"

結果：

the max number is: 6546
the min number is : 11

實現之二：

#! /bin/bash# echo the MAX and the MINecho "the numbers is:"cat 99shumnum=0min=99999while  read line dodeclare -a arr=($line)lnum=$(echo $line | wc -w)i=0while (( $i<$lnum ))do(($mnum<${arr[i]})) && mnum=${arr[i]}(($min>${arr[i]})) && min=${arr[i]}let ++idonedone < 99shuecho "the max number is $mnum"echo "the min number is $min"

實現3，強大的awk

#! /bin/bashecho "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 )"

實現4：

#!/bin/bashmin=$(cat  99shu | tr "\t" "\n"|tr " " "\n"|sort -n|uniq|grep -v "^$"|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"