区别:$@ $*
相同点:都是引用所有参数不同点:只有在双引号中体现出来。假设在脚本运行时写了三个参数(分别存储在$1 $2 $3)则"$*" 等价于 “$1 $2 $3"(传递了一个参数);而“$@" 等价于 "$1" "$2" "$3"(传递了三个参数)例子一
##dels.shecho "number:$#"echo "scname:$0"echo "first :$1"echo "second:$2"echo "argume:$@"echo "show parm list:$*"echo "show process id:$$"echo "show precomm stat: $?"执行结果
[@jihite]$ sh del.sh 1 2 3number:3scname:del.shfirst: 1second:2argume:1 2 3show parm list:1 2 3show process id:21057show precomm stat: 0例子二
#!/bin/shnum=$#name=$0echo "number:$num"echo "scname:$name"echo $0echo $1echo $2for ((i=0; i<$num; i++))doecho "$i"doneecho "argume:$@"for key in $@doecho $keydoneecho "-----------------"for key in "$@"doecho $keydoneecho "-----------------------------"for key2 in $*do echo $key2doneecho "-----------------"for key2 in "$*"do echo $key2doneecho "show process id:$$"choecho "show precomm stat: $?"执行结果
[@jihite]$ sh del.sh a b number:2scname:del.shdel.shab01argume:a bab-----------------ab-----------------------------ab-----------------a bshow process id:23582del.sh: line 37: cho: command not foundshow precomm stat: 127问题:
echo #0 #1 能不能用 $i 表示呢?
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