shell学习三十--综合应用

客官°小女子只卖身不卖艺 2022-06-04 07:49 207阅读 0赞

for循环打印下面这句话中的字母数不大于6的单词  
I am oldboy teacher welcome to wolf training class.  
\[root@node01 day13\]\# vi arr01.sh   
arr=(I am oldboy teacher welcome to wolf training class.)  
for wolf in $\{arr\[@\]\}  
do  
   if \[ $\{\#wolf\} -le 6 \]  
   then  
   echo $wolf  
   fi  
done  
\[root@node01 day13\]\# sh arr01.sh   
I  
am  
oldboy  
to  
wolf  
class.  
  
\[root@node01 day13\]\# vi arr02.sh   
\#!/bin/sh  
arr=(I am oldboy teacher welcome to wolf training class.)  
for((i=0;i<$\{\#arr\[\*\]\};i++))  
do  
    if \[ $\{\#arr\[$i\]\} -le 6 \]  
    then  
        echo $\{arr\[$i\]\}  
    fi  
done  
\[root@node01 day13\]\# sh arr02.sh   
I  
am  
oldboy  
to  
wolf  
class.  
  
\[root@node01 day13\]\# vi for.sh   
\#!/bin/sh  
char="(I am oldboy teacher welcome to wolf training class.)"  
for n in $char  
do  
   if \[ $\{\#n\} -le 6 \]  
   then   
   echo $n  
   fi  
done  
\[root@node01 day13\]\# sh for.sh   
(I  
am  
oldboy  
to  
wolf  
  
\#!/bin/sh  
for i in I am oldboy teacher welcome to wolf training class.  
do  
   \[  $\{\#i\} -le 6 \] && echo $i  
done  
\[root@node01 day13\]\# sh for01.sh   
I  
am  
oldboy  
to  
wolf  
class.  
\[root@node01 day13\]\# vi awk.sh  
\#!/bin/sh  
echo "I am oldboy teacher welcome to wolf training class."|awk '\{for(i=1;i<=NF;i++) if(length($i)<=6)print $i\}'  
\[root@node01 day13\]\# sh awk.sh   
I  
am  
oldboy  
to  
wolf  
class.  
\[root@node01 day13\]\#vi wc.sh  
\#!/bin/sh  
for i in I am oldboy teacher welcome to wolf training class.  
do  
   \[ \`echo $i|wc -L\` -le 6 \] && echo $i  
done  
  
\------------------------------------------  
a、for  
b、对字符串长度进行判断  
c、wc -L  
d、变量子串$\{\#wolf\}  
e、expr length   
f、awk