// file:    uml1.cc
// author:  keller
// RCS:     $Id: uml1.cc,v 1.1 2000/02/07 20:22:23 keller Exp $
//
// purpose: modeling the following UML class diagram
//
//    .---------------.             .---------------.
//    .   Building    .<*>----------.     Room      .
//    .---------------.           * .---------------.
//    .               .             . number        .
//    .               .             . length        .
//    .               .             . width         .
//    .---------------.             .---------------.
//    . addRoom()     .             .               .
//    .---------------.             .---------------.
//
// where <*> is supposed to be a filled-in diamond (composition>
//
// Note: For purposes of exposition and conciseness, we do not use separate 
// header files, etc., nor do we include all constructors, destructors, 
// and assignment operators.

#include <list>         // the STL list template

class Building;         // forward declaration


///////////////////////////////////////////////////////////////////////////////
// A Room is in a Building.  
// It has a number, length, and width.
// It knows its building.
///////////////////////////////////////////////////////////////////////////////

class Room
{
private:
    Building *building;		// the building containing this room
    int number;			// the room number of this room
    int length;			// the length of the room in feet
    int width;			// the width of the room in feet

public:

    // create a room in a building

    Room(Building *building, int number, int length, int width)
      {
      this->building = building;      
      this->number = number;
      this->length = length;
      this->width = width;
      }



    // print a description of the room

    void show(ostream &out)
      {
      out << "room " << number << " " << length << "x" << width << endl;
      }
};


///////////////////////////////////////////////////////////////////////////////
// A Building has a set of rooms.  
// Each is on a particular floor.
///////////////////////////////////////////////////////////////////////////////

class Building 
{
private: 
    list<Room*> rooms;		// list of pointers to Room

public:

    // create a Building

    Building()
      {
      }


    // add a new room to the building

    void addRoom(int number, int floor, int length, int width)
      {
      Room *theNewRoom = new Room(this, number, length, width);
      rooms.push_back(theNewRoom);
      }


    // show the contents of the building

    void show(ostream &out)
      {
      list<Room*>::iterator p;
      
      for( p = rooms.begin(); p != rooms.end(); ++p )
        {
        (*p)->show(out);
        }
      }
};


// test program
// create a building, add some rooms, and show the contents

main()
{
Building b;

b.addRoom(101, 1, 10, 20);
b.addRoom(102, 1, 15, 30);
b.addRoom(201, 2, 20, 25);
b.addRoom(301, 3, 30, 50);

b.show(cout);
}


/* output:

room 101 10x20
room 102 15x30
room 201 20x25
room 301 30x50

*/