如何使用XPUB和XSUB在ZeroMQ(c++)中使用代理实现公共子网络?

I am a newcomer to zeromq. Recently I did some tests on pub/sub of zeromq, and I don't konw how to implement Pub-Sub Network with a Proxy by using XPUB and XSUB in ZeroMQ. Hope your help, thank you very much .I am a newcomer to zeromq. Recently I did some