person.cpp

《c＋＋大学教程》源码

// Fig. 7.46: person.cpp
// Member-function definitions for class Person.
#include <iostream>

using std::cout;
using std::endl;

#include "person.h"    // Person class definition
#include "floor.h"     // Floor class definition
#include "elevator.h"  // Elevator class definition

// initialize static member personCount
int Person::personCount = 0;

// constructor
Person::Person( int destFloor )
   : ID( ++personCount ), 
     destinationFloor( destFloor ) 
{
   cout << "person " << ID << " constructed" << endl;

} // end Person constructor

// destructor
Person::~Person() 
{ 
   cout << "(person " << ID << " destructor invoked)" << endl;

} // end ~Person destructor

// return person's ID number
int Person::getID() const 
{ 
   return ID; 

} // end function getID

// person walks onto a floor
void Person::stepOntoFloor( Floor& floor )  
{
   // notify floor person is coming
   cout << "person " << ID << " steps onto floor " 
        << floor.getNumber() << endl;
   floor.personArrives( this );

   // press button on floor
   cout << "person " << ID 
        << " presses floor button on floor " 
        << floor.getNumber() << endl;
   floor.floorButton.pressButton();

} // end function stepOntoFloor

// person enters elevator
void Person::enterElevator( Elevator &elevator, Floor &floor )
{   
   floor.personBoardingElevator();   // person leaves floor

   elevator.passengerEnters( this ); // person enters elevator

   // press button on elevator
   cout << "person " << ID 
        << " presses elevator button" << endl;
   elevator.elevatorButton.pressButton();

} // end function enterElevator

// person exits elevator
void Person::exitElevator( 
   const Floor &floor, Elevator &elevator ) const
{
   cout << "person " << ID << " exits elevator on floor "
        << floor.getNumber() << endl;
   elevator.passengerExits();

} // end function exitElevator

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