shell $* $@ $#

test.sh 1 2 3

$* 为"1 2 3"

$@ 为"1" "2" "3"

$# 为3，参数数量

 

#！/bin/bash
my_fun(){
    echo "$#"
}

echo "$@"
echo "$#"

echo "$(my_fun "$@")"
echo "$(my_fun "$#")"

test.sh 1 2 3 2输出

1 2 3 2

4

4

1