Demonstrating composition--an object with member objects : class combination « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. class combination

#include <iostream>
using std::cout;
using std::endl;

#include <cstring> 
using std::strlen;
using std::strncpy;



class Date 
{
public:
   Date( int = 1, int = 1, int = 1900 );
   void print() const; 
   ~Date(); 
private:
   int month; 
   int day; 
   int year;
};

Date::Date( int mn, int dy, int yr )
{
   month = mn;
   year = yr;
   day = dy );
}
void Date::print() const
{
   cout << month << '/' << day << '/' << year; 
}
Date::~Date()
{ 
   cout << "Date object destructor for date ";
   cout << endl;
}

class Employee
{
public:
   Employee( const char * const, const char * const, 
      const Date &, const Date & );
   void print() const;
   ~Employee();
private:
   char firstName[ 25 ];
   char lastName[ 25 ];
   const Date birthDate; 
   const Date hireDate; 
};
Employee::Employee( const char * const first, const char * const last,const Date &dateOfBirth, const Date &dateOfHire )
   : birthDate( dateOfBirth ), hireDate( dateOfHire ) 
{
   strcpy( firstName, first);
   strcpy( lastName, last);
}
void Employee::print() const
{
   cout << lastName << ", " << firstName << "  Hired: ";
   hireDate.print();
   cout << "  Birthday: ";
   birthDate.print();
   cout << endl;
}
Employee::~Employee()
{ 
   cout << "Employee destructor: " << lastName << ", " << firstName << endl;
}

int main()
{
   Date birth( 7, 24, 1949 );
   Date hire( 3, 12, 1989 );
   Employee manager( "A", "B", birth, hire );

   cout << endl;
   manager.print();

   return 0;
}

B, A  Hired: 3/12/1989  Birthday: 7/24/1949
Employee destructor: B, A
Date object destructor for date
Date object destructor for date
Date object destructor for date
Date object destructor for date