Someone

feedmain.cpp
     14 #include "connection.h"
     15 #include "client.h"
     16
     17 connection *clients[200];

connection.h
#ifndef my_conn
#define my_conn
class connection {
        public:
                int fd;

                connection();
                ~connection(){}
                virtual int readline();
        private:
};
#endif


client.h
#include "connection.h"

class client : connection {
}