shell 石头剪刀布

#!/bin/bash

count=0
count1=0
menu="
-----0.石头-----
-----1.剪刀-----
-----2.布-------
请选择你的拳法[0|1|2]: "
while true
do
guess=("石头" "剪刀" "布")
index=$(($RANDOM%3))
compute=${guess[$index]}

read -p "$menu" num
player=${guess[$num]}

echo -e "你出的${guess[$num]} VS 电脑出的${guess[$index]}\n"
dd=$(($num-$index))
if [ $dd -eq 1 -o $dd -eq -2 ]
then
        echo "你赢了"
        count=$(($count+1))
        echo "$count"

elif [ $dd -eq 0 ]
then
        echo "平局"
else
        echo "输了"
        count1=$(($count1+1))
        echo "$count1"

fi

        if [ $count -eq 2  ]
        then
        echo "玩家胜利"
        exit
        elif [ $count1 -eq 2 ]
        then
        echo "电脑胜利"
        exit
        fi
done