bash 函数思想实现数组冒泡排序

　　

 1 #!/bin/env sh
 2 
 3 read -p 'input length of array:' var
 4 [[ ! $var =~ [[:digit:]] ]] && echo 'input wrong' && exit 5
 5 
 6 declare -a pp
 7 
 8 for z in `seq 0 1 $[var-1]`;do
 9     pp[$z]=$RANDOM
10 done
11 
12 echo ${pp[@]}
13 
14 function desc(){
15     local pp
16     declare -a pp
17     pp=($@)
18     local num=${#pp[*]}
19     echo $num
20     for ((i=0;i<num;i++));do
21         for ((j=i+1;j<num;j++));do
22             if [ ${pp[i]} -lt ${pp[j]} ];then
23                 nn=${pp[i]}
24                 pp[i]=${pp[j]}
25                 pp[j]=$nn
26             fi
27         done
28     done
29     echo "desc sort:"
30     echo ${pp[*]}
31 }
32 
33 desc ${pp[*]}
34 
35 function asc(){
36     local pp
37     declare -a pp
38     pp=($*)
39     local num=${#pp[*]}
40     echo $num
41     for ((i=0;i<num;i++));do
42         for ((j=i+1;j<num;j++));do
43             if [ ${pp[i]} -gt ${pp[j]} ];then
44                 nn=${pp[i]}
45                 pp[i]=${pp[j]}
46                 pp[j]=$nn
47             fi
48         done
49     done
50 
51     echo "asc scort:"
52     echo ${pp[@]}
53 }
54 
55 asc ${pp[*]}

bash 中不能直接传递数组,只能先拆包在重新生成数组

开始先利用[[ ]]做正则条件判断,非数字退出

posted @ 2020-05-28 13:36  ascertain  阅读(172)  评论(0)    收藏  举报