Subscription to 2 or more topics

[lavqz]

My project has many clients, and some of these clients must be subscribed to 2 or more topics. If I write this way, then the subscription goes only to the last topic:

  client.setCallback(Publish_temp2);
  client.subscribe(topic_temp2);
  client.setCallback(Publish_temp1);
  client.subscribe(topic_temp1);

How to subscribe to more than one?
Sorry for the possibly bad language (I'm using a translator)