Customer.h

#ifndef CUSTOMER_H
#define CUSTOMER_H

#include "Address.h"

/* 
A pointer to an incomplete type (hides the implementation details). 
*/
typedef struct Customer* CustomerPtr;

/* 
Create a Customer and return a handle to it. 
*/
CustomerPtr createCustomer(
  const char* name,
  const Address* address);

/* 
Destroy the given Customer object.
All handles to it will be invalidated. 
*/
void destroyCustomer(
  CustomerPtr customer);

#endif