#include <stdint.h>
#include <stdio.h>

uint32_t numeric_ip4(const char *ip) {
  uint32_t octets = 0;
  uint8_t octet = 0;

  for(; *ip; ip += 1) {
    if(*ip == '.') {
      octets = (octets << 8) | octet; 
      octet = 0;
    } else {
      octet = (octet * 10) + (*ip - '0');
    }
  }

  return (octets << 8) | octet;
}

int main(int argc, char **argv) {
  for(argv += 1, argc -= 1; *argv; argv += 1, argc -= 1) {
    printf("%s: %u\n", *argv, numeric_ip4(*argv));
  }

  return 0;
}