Programming

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>

int main(int argc, const  char **argv)
{

     struct hostent *hp;
     char **p;

     hp=gethostbyname(argv[1]);
     if (hp == NULL) {
          (void) printf("host information for %s no found \n", argv[1]);
          exit (3);
     }

     for (p = hp->h_addr_list; *p!=0;p++){
         struct in_addr in;
         char **q;

         (void)memcpy(&in.s_addr, *p, sizeof(in.s_addr));
         (void)printf("%s\t%s",inet_ntoa(in), hp->h_name);
         for (q=hp->h_aliases;*q != 0; q++)
              (void) printf("%s", *q);
        (void)putchar('\n');
     }
     return 0;
}

/* Includes used for some general things */
#include <stdio.h>
#include <stdlib.h>

/* Includes used for most socket operations */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

/* Includes used for auxiliary calls: memset, etc. */
#include <strings.h>
#include <netdb.h>
#include <arpa/inet.h>

/* Defines */
#define SRV_ADDR "127.0.0.1"
#define SRV_PORT 65000
#define ECHO_DATA "Hello There - (1234567890)"
#define MAX_ECHO_LEN 180

/* The program */
int main(int argc, char **argv) {

	/* Types */
	//struct sockaddr_in sin;
      //char echo[MAX_ECHO_LEN];
	//int sock, len, i;
      //FILE *file;
      char **p;
      long int port;
      struct hostent *hp;
      
      printf("Error1\n");
      //return 0;
      /* The exe call goes like this: exe | IP address | port number | file 
         the |'s represent spaces */
      if (argc != 4)
      {
        
        printf("Invalid arguments.\n");
        return 0;
      }

      printf("Error2,%s\n",argv[1]);

      /* Sets the IP address to the first argument after the exe file call */
      hp = gethostbyname(argv[1]);

      if (hp = NULL)
      {
        printf("No IP address exists for hostname.\n");
        exit(1);
      }
      else
        printf("%s\n", hp->h_name);

      printf("Error3\n");

      for (p = hp->h_addr_list; *p!=0;p++){
        printf("Error3a\n");
	struct in_addr in;
	char **q;

        printf("Error3b\n");
	(void)memcpy(&in.s_addr, *p, sizeof(in.s_addr));
	(void)printf("%s\t%s",inet_ntoa(in), hp->h_name);
	for (q=hp->h_aliases;*q != 0; q++)
	  (void) printf("%s", *q);
        (void)putchar('\n');
      }
      printf("Error4\n");

 
      /* Sets the port number to the second argument after the exe file call */ 
      port = atoi(argv[2]);
 
      exit(0);
}