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Subject: fas

Author:
asdf

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Date Posted: 13:38:07 07/29/01 Sun

IN DERIVED CLASS DECLARATION:

class Vehicle_Class_Name:public baseClass
{
private:
�
public:
�
void * operator new(size_t s);
void operator delete(void * mem);
�
}

IN DERIVED CLASS IMPLEMENTATION

void * Vehicle_Class_Name::operator new(size_t s)
{
cout << "Vehicle_Class overloaded new called\n";
int id = SC::getLastID(); // assign a new index to the new object
SC::vpVehicles.push_back(::new Vehicle_Class_Name());
int sz = SC::vpVehicles.size();
SC::vpVehicles[sz-1]->setID(id);
SC::incrLastID();
SC::setNew();
return SC::vpVehicles[sz-1];
}

void Vehicle_Class_Name::operator delete(void * mem)
{
cout << " Vehicle_Class overloaded delete called \n";

vector::iterator first = SC::vpVehicles.begin(), last = SC::vpVehicles.end(), it;

it = find(first, last, (baseClass*)mem);
if(it != last)
{
::delete mem;
*it = NULL; // set mem = NULL
SC::setDelete();
}
else
cerr <<"Nothing can be deleted\n";
}

Note:
1) The derived class must include SC.h, which is from Simulation Controller. Some other header files are also necessary. See the following example.

2) The overloaded operators, �new� and �delete� must be declared and implemented in the derived class.

3) Vehicle_Class_Name can be AircraftCarrier, Aircraft, Destroyer, Cruiser, Battleship, Submarine, and various Weapon class names

4) Object can be created in the following way, eg., in AircraftCarrier class, when necessary:

Vector v1(1, 2, 3), v2(2, 3, 4);
flg = �R� or �B�;
Weapon *pw = new Weapon(flg, v1, v2);
delete pw;

In this case, the operators �new� and �delete� here are the overloaded operators in the Weapon class.

Example:
//////////////////////////////////////////////////////////////////////////////////

//aircraft.h
#include "stdafx.h"

#include
#include
#include
#include
#include
#include //find()

using namespace std;

#ifndef _AIRCRAFT_H_
#define _AIRCRAFT_H_

#include "baseclass.h"
#include "Vector.h"
#include "SC.h"

class Aircraft:public baseClass
{
private:
int type;
Vector currPos; // initial position
Vector destPos; // destination position
Vector buffPos;
bool active;
char flag;

public:
Aircraft();
Aircraft(char fl, Vector& cPos, Vector& dPos);
~Aircraft();
char getFlag();
Vector getPosition();
void updatePosition();
int getType();
bool isActive();
void execute(double t);
void * operator new(size_t s);
void operator delete(void * mem);
};

#endif

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