// C language

struct person {                       // use struct to record data
  char *name;                         // name is really a string, awkward in C
  int age;
};
typedef struct person *person_ptr;    // C is famous for ptrs to things

// function acts as a constructor of new person records
person_ptr personConstructor(char *name, int age) {      // new name and age
  person_ptr p;                                          // declare a ptr
  p = (person_ptr)malloc(sizeof(struct person));         // allocate space from dynamic memory
  p->name = name;                                        // fill-in the fields
  p->age = age; 
  return p;                                              // return ptr to caller
}

void personDestructor(person_ptr p) {                    // return space back to dynamic memory
  free(p);
}

char *getName(person_ptr p) {                            // accessor function to return name
  return p->name;                                        // NOTE: ptr is parameter to function
}                                                        // Opposite in OO: obj.method()

int getAge(person_ptr p) {                               // accessor function
  return p->age;
}

char* toString(person_ptr p) {                           // covert fields into one string
  char *buffer = (char *)malloc(sizeof(char)*50);        // memory leak - buffer never free'd 
  sprintf(buffer,"%s  %d",getName(p),getAge(p));
  return buffer;
}