错误提示：
error MSB8031: Building an MFC project for a non-Unicode character set is deprecated. You must change the project property to Unicode or download an additional library. See http://go.microsoft.com/fwlink/p/?LinkId=286820 for more information.
下载一个MFC的库就OK了
下载地址：https://www.microsoft.com/en-us/download/details.aspx?id=40770