Thread: Implicit declaration

I'm trying to learn up on socket programming, so I took a sample program and tried compiling it, I'm getting implict declarations for bzero and close.

Code:

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdlib.h>

#define MY_PORT_ID     6089              
#define SERVER_PORT_ID     6090              
#define SERV_HOST_ADDR "128.119.40.186"  

main()
{
   int sockid, retcode;
   struct sockaddr_in my_addr, server_addr;
   char msg[12];
   
   printf("Client: creating socket\n");
      if ( (sockid = socket(AF_INET, SOCK_DGRAM, 0)) < 0) 
      { printf("Client: socket failed: %d\n",errno); exit(0); }


   printf("Client: binding my local socket\n");
   bzero((char *) &my_addr, sizeof(my_addr));
   my_addr.sin_family = AF_INET;
   my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
   my_addr.sin_port = htons(MY_PORT_ID);
   if ( (bind(sockid, (struct sockaddr *) &my_addr, 
              sizeof(my_addr)) < 0) )
      { printf("Client: bind fail: %d\n",errno); exit(0); }   

   printf("Client: creating addr structure for server\n");
   bzero((char *) &server_addr, sizeof(server_addr));
   server_addr.sin_family = AF_INET;
   server_addr.sin_addr.s_addr = inet_addr(SERV_HOST_ADDR);
   server_addr.sin_port = htons(SERVER_PORT_ID);

   printf("Client: initializing message and sending\n");
   sprintf(msg,  "Hello world");
   retcode = sendto(sockid,msg,12,0,(struct sockaddr *) &server_addr,
 		    sizeof(server_addr));
   if (retcode <= -1)
     {printf("client: sendto failed: %d\n",errno); exit(0); }   

   /* close socket */
   close(sockid);
 }

Windows system

I'll try