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

typedef struct Person Person;

struct Person {
  char* (*get_name)(Person*);
  void (*set_name)(Person*, char* name);
  void (*talk)(Person*);

  char* name_;
};

char* Person_get_name(Person* this) {
  return this->name_;
}

void Person_set_name(Person* this, char* name) {
  this->name_ = name;
}

void Person_talk(Person* this) {
  printf("Hello, this is %s!\n", this->name_);
}

Person* new_Person(char* name) {
  Person* this = malloc(sizeof(Person));
  this->get_name = Person_get_name;
  this->set_name = Person_set_name;
  this->talk = Person_talk;
  this->set_name(this, name);
  return this;
}

void free_Person(Person* this) {
  free(this);
}

int main(void) {
  Person* person = new_Person("Foo");
  person->talk(person);
  free_Person(person);

  return 0;
}