获取本机的主机名和ip地址

#include <iostream>
#include <netdb.h>
       #include <sys/socket.h>
       #include <netinet/in.h>
       #include <arpa/inet.h>
using namespace std;
string GetEndpoint() {
  char host_name[255];
  if(gethostname(host_name, 255) == -1) {
    return "";
  }   
  cout <<" hostname:" << host_name <<endl;
  struct hostent *phe = gethostbyname(host_name);
  if (phe == 0) {
    return "";
  }
  string ip;
  for (int i = 0; phe->h_addr_list[i] != 0; ++i) {
    struct in_addr addr;
    memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
    ip = inet_ntoa(addr);
    cout <"ip:" << ip <<endl;
  }   
  return ip+":11315";
}