shift

#!/bin/bash
until [ $# -eq 0 ]
do
echo "第一个参数为: $1 参数个数为: $#"
shift
done


#!/bin/bash
if [ $# -eq 0 ]
then
	echo "usage:sumints integer list"
	exit 1
fi
sum=0
until [ $# -eq 0 ]
do
	sum=`expr $sum + $1`
	shift
done
echo $sum