Use C + + as a substitute for the use of C. Package!

See a lot of people write C code, the structure for the various components of the package, for example, use reproduced as follows Epoll sample:

   //A simple echo server using Epoll in Linux  //   //2009-11-05  //2013-03-22: Changed a few questions , 1 is the/n format problem. 2 is to remove the original code accidentally added to the ET mode,//is only a simple schematic program. Decide or add recv/send when buffer offset/by sparkling  //    #include <sys/socket.h>   #include <sys/ epoll.h>   #include <netinet/in.h>   #include <arpa/inet.h>   #include <fcntl.h>   #include <unistd.h>   #include <stdio.h>   #include <errno.h>   #include < iostream>  using namespace Std;   #define Max_events  struct myevent_s  {     int fd;      void (*call_back) (int fd, int events, void *arg);      int events;      void *arg;      int status; 1:in epoll Wait list, 0 not in      Char buff[128]; recv data buffer      int len, s_offset;      long LAst_active; Last Active Time  };  //Set Event  void eventset (myevent_s *ev, int fd, void (*call_back) (int, int, void*), void *arg)  {&nbsp ;    ev->fd = FD;      ev->call_back = Call_back;      ev->events = 0;      ev->arg = arg;      ev->status = 0;    bzero (ev->buff, sizeof (Ev->buff));     Ev->s_offset = 0;      Ev->len = 0;    ev->last_active = time (NULL);  }  //add/mod an event to Epoll  void eventadd (int epollfd, int events, myevent_s *ev)  { &nbsp ;   struct Epoll_event Epv = {0, {0}};      int op;      epv.data.ptr = EV;      epv.events = ev->events = events;      if (ev->status = = 1) {         op = epoll_ctl_mod;     }      else{         op = epoll _ctl_add;          ev->status = 1;     }      if (Epoll_ctl (EPOLLFD, op, EV-&GT;FD, &AMP;EPV) < 0)           printf ("Event Add failed[fd=%d], evnets[%d]\n", EV-&GT;FD, events);      Else          printf ("Event Add ok[fd=%d", op=%d, Evnets[%0x]\n ", EV-&GT;FD, OP, events);  }  //Delete an event from Epoll  void eventdel (int epollfd, myevent_s *ev)  {   &nbs P struct Epoll_event Epv = {0, {0}};      if (ev->status! = 1) return;      epv.data.ptr = EV;      ev->status = 0;    epoll_ctl (EPOLLFD, Epoll_ctl_del, EV-&GT;FD, &AMP;EPV);  }  int G_EPOLLFD;  myevent_s g_EVENTS[MAX_EVENTS+1]; G_events[max_events] is used by listen FD  void recvdata (int fd, int Events, void *arg);  void senddata (int fd, int events, void *arg);  //accept new connections from clients  void acceptconn (int fd, int events, void *arg)  {  &nbs p;  struct sockaddr_in sin;      socklen_t len = sizeof (struct sockaddr_in);      int NFD, I;     //Accept      if (NFD = Accept (FD, (struct sockaddr*) &sin, &len)) = =-1)      {         if (errno! = Eagain && errno!) = eintr)          {        }         printf ("%s:accept,%d", __func__, errno);          return;     }      do    &nbsp {         for (i = 0; i < max_events; i++)      & nbsp;   {             if (g_events[i]. Status = = 0)              {                  break;             }          }          if (i = = max_events)           {             printf ("%s:max Connection limit[%d]. ", __func__, max_events);              break;         }         //Set Nonblocking        int iret = 0;        if (iret = Fcntl (NFD, F_SETFL, O_nonblock)) < 0)         {             printf ("%s:fcntl nonblocking failed:%d", __func__, Iret);             break;       }       / /Add a read event for receive data          Eventset (&g_events[i], NFD, RECV Data, &g_events[i]);          Eventadd (G_EPOLLFD, Epollin, &g_events[i]);     }while (0);      printf ("New conn[%s:%d][time:%d], pos[%d]\n", Inet_ntoa (sin.sin_addr),              Ntohs (Sin.sin_port), g_events[i].last_active, i);  }  //receive DATA  void recvdata (int fd, int events, void *arg)  {     struct myevent_s *ev = (struct Mye vent_s*) Arg;      int len;     /Receive data    len = recv (fd, Ev->buff+ev->len, sizeof (Ev->buff)- 1-ev->len, 0);        eventdel (G_EPOLLFD, Ev);    if (len > 0)     {        Ev->len + = len;         Ev->buff[len] = ' + ';          printf ("c[%d]:%s\n", FD, Ev->buff);         //Change to send event           Eventset (EV, FD, senddata, Ev);          Eventadd (G_EPOLLFD, epollout, Ev);     }      Else if (len = = 0)      {          Close (EV-&GT;FD);          printf ("[fd=%d] pos[%d], closed gracefully.\n", FD, ev-g_events);     }      Else      {          Close (EV-&GT;FD);          printf ("recv[fd=%d] error[%d]:%s\n", FD, errno, Strerror (errno));     }    //send data  void senddata (int fd, int events, void *arg)  { &nb sp;   struct myevent_s *ev = (struct myevent_s*) arg;      int len;     //Send data      len = Send (FD, Ev->buff + ev->s_offset, Ev->len- Ev->s_offset, 0);    if (len > 0)      {         printf ("send[fd=%d], [%d<->%d]%s\n", FD, Len, Ev->len, Ev->buff);       &nbsP Ev->s_offset + = len;        if (ev->s_offset = = Ev->len)          {           //change to Receive event            Eventdel (g_epollFd, Ev);              eventset (EV, FD, recvdata, Ev);              Eventadd (G_EPOLLFD, Epollin, Ev);         }   }      Else       {         close (EV-&GT;FD);           Eventdel (G_EPOLLFD, Ev);          printf ("send[fd=%d] error[%d]\n", FD, errno);     }  }  void initlistensocket (int epollfd, short port)   {     int listenfd = socket (af_inet, sock_stream, 0);      fcntl (LISTENFD, f_ SETFL, O_nonblock); Set non-blocking      printf ("Server Listen fd=%d\n", LISTENFD);      Eventset (&g_events[max_events], LISTENFD, Acceptconn, &g_events[max_events]);     //Add Listen socket      eventadd (EPOLLFD, Epollin, &g_events[max_ EVENTS]);     /Bind & listen      sockaddr_in sin;      bzero (&sin, sizeof (sin));      sin.sin_family = af_inet;      sin.sin_addr.s_addr = Inaddr_any;      Sin.sin_port = htons (port);      bind (LISTENFD, (const sockaddr*) &sin, sizeof (sin));      Listen (LISTENFD, 5); &NBSP;}  int main (int argc, char **argv)  {     unsigned short port = 12345; Default Port      if (argc = = 2) {         port = atoi ( ARGV[1]);     }     //create epoll      G_EPOLLFD = epoll_create ( max_events);      if (g_epollfd <= 0) printf ("Create Epoll failed.%d\n", G_EPOLLFD);     /Create & Bind listen socket, and add to Epoll, set non-blocking      I Nitlistensocket (G_EPOLLFD, Port);     //Event loop      struct epoll_event events[max_events];      printf ("Server running:port[%d]\n", port);      int checkpos = 0;      while (1) {        //A simple timeout check here,  Every time, better to use a mini-heap, and add timer event          Long now = Time (NULL);          for (int i = 0; i <; i++, checkpos++)//doesn ' t check listen fd           {             if (Checkpos = = max_events) Checkpos = 0; Recycle              if (g_events[checkpos].status!) = 1) Continue;              Long Duration = Now-g_events[checkpos]. last_active;              if (duration >=)//60s timeout  & nbsp;           {                  Close (G_EVENTS[CHECKPOS].FD);                  printf ("[fd=%d ] timeout[%d--%d].\n ", G_EVENTS[CHECKPOS].FD, G_events[cheCkpos].last_active, now);                  Eventdel (g_ EPOLLFD, &g_events[checkpos]);             }          }         //Wait for events to happen     & nbsp;    int FDS = epoll_wait (G_EPOLLFD, events, max_events, 1000);          if (FDS < 0) {              printf ("Epoll_wait error, exit\n");              break;         }          for (int i = 0; i < FDS; i++) {             myevent_s *ev = (struct myevent_s*) Events[i].data.ptr;              if (Events[i].events&epollin) & & (Ev->events&epollin))//Read Event               {                 ev-> Call_back (EV-&GT;FD, events[i].events, Ev->arg);             }               if ((events[i].events&epollout) && (ev->events&epollout))/ /write event              {                  Ev->call_back (EV-&GT;FD, Events[i]. events, Ev->arg);             }          } &NBSP;&NBSP;&NBSP;&NBsp }     //free resource      return 0;  }   

I was thinking, can't you just use C + + it?

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Use C + + as a substitute for the use of C. Package!