struct sockaddr_in *ipv4 = (struct sockaddr_in *)p->ai_addr;
printf("%d\n", ipv4->sin_family);
printf("%d\n", ipv4->sin_port);
printf("%d\n", ipv4->sin_addr);
addr = &(ipv4->sin_addr);
printf("%d\n", addr);
ipver = "IPv4";


inet_ntop(p->ai_family, addr, ipstr, sizeof ipstr);
printf("  %s: %s\n", ipver, ipstr);

# output

2
0
16777343
31728020
  IPv4: 127.0.0.1