#include <stdlib.h>
#include <string.h>
#include <stdio.h>

struct date {
  int year;
  int month;
  int day;
};

typedef struct {
  struct date birth;
  char name[10];
} person;

char *vowels = "aeiou";

char random_consonant()
{
  for (;;) {
    char letter = 'a' + rand() % 26;
    if (!strchr(vowels, letter)) return letter;
  }
}

char random_vowel()
{
  return vowels[rand() % strlen(vowels)];
}

char *random_name()
{
  static char buf[9];
  memset(buf, 0, 9);
  for (size_t i = 0; i < 4; i++) {
    buf[i*2] = random_consonant();
    buf[i*2+1] = random_vowel();
  }
  buf[0] -= 'a' - 'A';
  return buf;
}

void generate(person people[], int n)
{
  for (size_t i = 0; i < n; i++) {
    people[i].birth.year = 1900 + rand() % 123;
    people[i].birth.month = rand() % 12 + 1;
    people[i].birth.day = rand() % 28 + 1;
    strcpy(people[i].name, random_name());
  }
}

void print_person(person people[], int i)
{
  printf("%s born %02d-%02d-%04d\n", 
    people[i].name,
    people[i].birth.day,
    people[i].birth.month,
    people[i].birth.year);
}

void print_people(person people[], int n)
{
  for (size_t i = 0; i < n; i++) {
    print_person(people, i);
  }
}

int main() {
  person people[3];
  generate(people, 3);
  print_people(people, 3);
  return 0;
}