在shell中使用参数的时候出现不是别$1 $2的情况

Question

 #!/usr/bin/expect -f
set host $1
set passwd $2
set name root

#for host in "$1"
#for passwd in "$2"

spawn ssh $host -l $name
expect "root@$host’s password:"
send "$passwd\r"

send"uname\n"
expect"LINUX"
send_user"success"

expect"Permission denied,please try again."
send_user"wrongnumber"

传入的两个参数是目标ip和密码，实现自动ssh的功能，是不是因为用了expect导致了这种情况？
错误如下：
can't read "1": no such variable
while executing
"set host $1"
(file "/home/hht/workspace/work1/ssh1.sh" line 2)

Answer 1

set host [lindex $argv 1]