Shell Scripting Exercises

First, using the shell script to implement the progress bar

#!/bin/bashfunction proc ()   4 {  5     count=0   6     bar= ""   7     lable= ("|"   "/"   "-"   "\")   8     while [  $count  -le  100 ]  9     do 10              let index=count%4 11              printf  "[\033[1m\033[1;34m%-101s\033[0m] [%d%%] [%c]\ R   $bar   $count   ${lable[$index]} " 12              bar=${bar} ' # '  13               (( count++ ))  14              sleep 0.05 15     done 16     #   printf  "\ n"  17 } 18 proc

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Ii. seeking 1-100 and (non-recursive)

#！         /bin/bash sum=0 str= "" "for I in {1..100}" sum+=i [$i-eq] && {26 Str=${str}${i} str=${str}${i} ' + ' ((sum=sum+i)) done #echo $sum echo "$str =$ Sum

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Summation of three or 1-100 (recursive)

#！         /bin/bashfunction sum () 4 {5 local val=$1 6 Local res 7 if [$val-eq 1];then 8 echo 1 9 Return ten fi one local tem= $val tem--local tem1=0 tem1=$ (sum $tem) = $tem 1+ $val echo $res) sum 100

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Iv. to find the maximum, minimum, average value of a number in a file

Three number of file files: 100,200,300

 1 #!/bin/bash  2 count=0  3 while read line  4      do  5         let ++ count  6         [  $count  -eq 1 ]  && min= $line  && max= $line   7          let sum+= $line   8          [  $line  -gt  $max  ] && max= $line   9          [  $line  -lt  $min  ] && min= $line  10      done <file 11     echo  "max: ${ Max} " 12     echo " Min: ${min} " 13      printf  "argv: "  14     echo  "base=10;scale=2; 15     ${sum}/${ Count} "&NBSP;|&NBSP;BC

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V. Fibonacci sequence (non-recursive)

 54 #!/bin/bash 55  56 function fib ()  57 { 58     read val 59     fib_ arr[1]=1 60     fib_arr[2]=1 61     local  count=0 62     while [  $count  -le  $val  ] 63      do 64         let fib_arr[$ count+2]=fib_arr[$count +1]+fib_arr[$count] 65          ( count++))  66     done 67     echo ${fib_arr[$ Val]} 68 } 69 fib 

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Vi. Fibonacci (Recursive)

#!/bin/bashfunction fib ()  76 { 77     local val=$1 78      local fiv_val1=0 79     local fiv_val2=0  80     local fiv_curr=0 81     if [  $1 -lt 3 ];then 82              echo 1 83              Return 84     fi 85     let val-- 86      fiv_val1=$ ( fib  $val  )  87     let  val-- 88     fiv_val2=$ ( fib  $val  )  89      let fiv_curr= $fiv _val1+ $fiv _val2 90     echo  $FIV _ Curr 91 } 92 ret=$ (fib  $val)  93 echo  "$ret" 

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Convert a string in a price: for example: "123abc456", "456abc123"

The file is "123abc456" converted to "456abc123"

#!/bin/bash Read name str1=$ (echo $line | cut-c 1-3) str2=$ (echo $line | cu T-c 4-6 | TR ' [A-z] ' [A-z] ') str3=$ (echo $line | cut-c 7-9) echo ${str3}${str2}${str1} done< $name >${name}_ Bak function Main () {read target sum $target)

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Shell Scripting Exercises