define a struct

how to use a macro of structure ? 

Here I am listing  steps for it by using a demo:

1. macro a structure:

   #define structed_define                              
           {                                       
             "this is a demo for structed",1883        
           }

   this is a macro for structure.

2. define a structure class:

   typedef struct_static
   {
       char* name;
       int port;
   } xi_static_host_desc_t;

   this is a structure class

3. define a const class which is using the structure:  #define XI_MQTT_HOST_ACCESSOR ( ( xi_static_host_desc_t )structed_define) 
   
4. assign buffer and int :

   unsigned int b;
   char buf[32];
   b=XI_MQTT_HOST_ACCESSOR.port;
   memcpy(buf,XI_MQTT_HOST_ACCESSOR.name,strlen(XI_MQTT_HOST_ACCESSOR.name));

   End

5. Note.