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$*和$@之间差别代码分析

时间:2016-01-01 09:22:25      阅读:189      评论:0      收藏:0      [点我收藏+]
#!/bin/bash
set ‘apple pie‘ pears peaches
for i in $*           /*单引號被去掉,循环单个字符输出*/
do echo $i

done

[root@luozhonghua Ex_14.02-14.31]# sh 14-14-1
apple
pie
pears
peaches

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

#!/bin/bash
set ‘apple pie‘ pears peaches
for i in "$*"      /*单引號被去掉。但当作字符串一次输出*/
do echo $i
done

[root@luozhonghua Ex_14.02-14.31]# sh 14-14-2
apple pie pears peaches
[root@luozhonghua Ex_14.02-14.31]#


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



#!/bin/bash
set ‘apple pie‘ pears peaches
for i in $@          /*单引號被去掉。循环单个字符输出*/
do echo $i     
done
[root@luozhonghua Ex_14.02-14.31]# sh 14-14-3
apple
pie
pears
peaches


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

#!/bin/bash
set ‘apple pie‘ pears peaches
for i in "$@"      /*每一个位置參数都将当成一个加引號的字符串:"apple pie","pears ","peaches"*/
do echo $i
done
[root@luozhonghua Ex_14.02-14.31]# sh 14-14-4
apple pie
pears
peaches









$*和$@之间差别代码分析

原文:http://www.cnblogs.com/gcczhongduan/p/5092993.html

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