1 class Person
 2 {
 3 private:
 4     string name;
 5     MyDate birthday;
 6     MyAddress address;
 7
 8 public:
 9     // fallows functions
10     // ...
11 };

1 #include <string>
2 #include "MyDate.h"
3 #include "MyAddress.h"

 1 // Person.h
 2 #include <string>
 3 using namespace std;
 4
 5 class PersonImp;
 6
 7 class Person
 8 {
 9 private:
10     //string Name;
11     //MyDate Birthday;
12     //MyAddress Address;
13     PersonImp* MemberImp;
14
15 public:
16     string GetName() const;
17     string GetBirthday() const;
18     string GetAddress() const;
19     // follows functions
20     // ...
21 };

 1 // Person.cpp
 2 #include "PersonImp.h"
 3 #include "Person.h"
 4
 5 string Person::GetName() const
 6 {
 7     return MemberImp->GetName();
 8 }
 9 string Person::GetBirthday() const
10 {
11     return MemberImp->GetName();
12 }
13 string Person::GetAddress() const
14 {
15     return MemberImp->GetAddress();
16 }

 1 // PersonImp.h
 2 #ifndef PersonImp_H
 3 #define PersonImp_H
 4
 5 #include <string>
 6 #include "MyAddress.h"
 7 #include "MyDate.h"
 8 using namespace std;
 9
10 class PersonImp
11 {
12 private:
13     string Name;
14     MyAddress Address;
15     MyDate Birthday;
16
17 public:
18     string GetName() const
19     {
20         return Name;
21     }
22
23     string GetAddress() const
24     {
25         return Address.ToString();
26     }
27
28     string GetBirthday() const
29     {
30         return Birthday.ToString();
31     }
32 };
33
34 #endif /* PersonImp_H */

 1 // MyDate.h
 2 #ifndef MY_DATE_H
 3 #define MY_DATE_H
 4
 5 #include <string>
 6 using namespace std;
 7
 8 class MyDate
 9 {
10 private:
11     int Year;
12     int Month;
13     int DayOfMonth;
14
15 public:
16     string ToString() const;
17 }
18 #endif /* MY_DATE_H */

 1 // MyAddress.h
 2 #ifndef MY_ADDRESS_H
 3 #define MY_ADDRESS_H
 4
 5 #include <string>
 6 using namespace std;
 7
 8 class MyAddress
 9 {
10 private:
11     string Country;
12     string Province;
13     string City;
14     string Street;
15
16 public:
17     string ToString() const;
18 };
19
20 #endif /* MY_ADDRESS_H */