#!/bin/bashnumber=65       #定義一個退出值index=1          #定義一個計數(shù)器if [ -z "$1" ];then              #對用戶輸入的參數(shù)做判斷，如果未輸入?yún)?shù)則返回腳本的用法并退出，退出值65  echo "Usage:$0 + canshu"  exit $numberfiecho "listing args with /$*:"         #在屏幕輸入，在$*中遍歷參數(shù)for arg in $*                     do  echo "arg: $index = $arg"           let index+=1doneechoindex=1                       #將計數(shù)器重新設置為1echo "listing args with /"/$@/":"    #在"$@"中遍歷參數(shù)for arg in "$@"do  echo "arg: $index = $arg"  let index+=1done

#!/bin/bashnumber=11if [ $# -eq 0 ];then  echo "Usage: $0 + canshu"  exit $numberfifor i in $*        #在$*中遍歷參數(shù)，此時每個參數(shù)都是獨立的，會遍歷$#次do  echo $idoneechofor i in "$*"      #在"$*"中遍歷參數(shù)，此時"$*"被擴展為包含所有位置參數(shù)的單個字符串，只遍歷一次do  echo $idone

#!/bin/bashnumber=11if [ $# -eq 0 ];then  echo "Usage: $0 + canshu"  exit $numberfifor i in $@do  echo $idoneechofor i in "$@"do  echo $idone