用批处理实现文件备份器V2.3

echo           ╭─────────┤    权限不足    ├─────────╮
echo           │                  ╰────────╯                  │
echo           │                                                        │
echo           │                                                        │
echo           │                                                        │
echo           │      非常抱歉，当前用户权限太低，无法运行本程序        │
echo           │                                                        │
echo           │      请换用具备管理员组权限的其他用户帐号来运行        │
echo           │                                                        │
echo           │                    按任意键退出...                     │