Linux shell脚本007（select菜单选项）

#!/bin/bash
names=(
        "张三"
        "李四"
        "王二"
)

echo "Please guess who is my friend :"
select var in ${names[@]}
do
        if [ x$var = x"李四" ]; then    #这里$var和"李四"前边的x，，是为了避免，当输入的选择不在select选项中（或$var为空），程序报错[: =: unary operator expected
         echo "$var my good friend"
         break
        else
         echo "Try again"
        fi
done

知识点：
select用法，if 用法，break用法
用select编写简单的菜单选项