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

int main() {
  struct sockaddr_in addr;
  addr.sin_family = AF_INET;         /* IPv4 */
  addr.sin_port = htons(8000);       /* Port */
  addr.sin_addr.s_addr = INADDR_ANY; /* equals to 0.0.0.0 */
  int sfd = socket(AF_INET, SOCK_STREAM, 0);
  if (sfd == -1) {
    perror("could not open socket");
    return 1;
  }
  int bind_addr = bind(sfd, (struct sockaddr *)&addr, sizeof(addr));
  if (bind_addr == -1) {
    perror("could not bind socket");
    return 1;
  }
  printf("hello world\n");
  return 0;
}