$*和[email protected]之间区别代码分析

#!/bin/bash

set ‘apple pie‘ pears peaches

for i in $*           /*单引号被去掉,循环单个字符输出*/

do echo $i

done

[[email protected] Ex_14.02-14.31]# sh 14-14-1

apple

pie

pears

peaches

--------------------------------------------------------------

#!/bin/bash

set ‘apple pie‘ pears peaches

for i in "$*"      /*单引号被去掉,但当作字符串一次输出*/

do echo $i

done

[[email protected] Ex_14.02-14.31]# sh 14-14-2

apple pie pears peaches

[[email protected] Ex_14.02-14.31]#

-----------------------------------------------------------------

#!/bin/bash

set ‘apple pie‘ pears peaches

for i in [email protected]          /*单引号被去掉,循环单个字符输出*/

do echo $i

done

[[email protected] Ex_14.02-14.31]# sh 14-14-3

apple

pie

pears

peaches

-----------------------------------------------------------------

#!/bin/bash

set ‘apple pie‘ pears peaches

for i in "[email protected]"      /*每个位置参数都将当成一个加引号的字符串:"apple pie","pears ","peaches"*/

do echo $i

done

[[email protected] Ex_14.02-14.31]# sh 14-14-4

apple pie

pears

peaches

$*和[email protected]之间区别代码分析,布布扣,bubuko.com

时间: 2024-12-26 21:11:16