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

    struct Animal {
      char * name;
      int age;
      struct Animal * mother;
      struct Animal * father;
    };

    struct Animal *
    Animal_new(char * name, int age) {
       struct Animal * self = (struct Animal *) malloc(sizeof(struct Animal));
       self->name = name;
       self->age = age;
       return self;
    }

    void
    Animal_inspect(struct Animal * self) {
      printf("%s is %d years old\n", self->name, self->age);
    }

    int
    main() {
      char foo = 'a';
      char bar = 'a';
      struct Animal * niko = Animal_new("Niko", 2);
      if (niko->age > 0 && niko->age < 100)
        Animal_inspect(niko);
      return 0;
    }