Re-running program! displayed unreadable charactes..

[copperhead]

hi all guru,

here, my problem is re-running the program, the vector attribute was retrieved and displayed unreadable characters.. WHY??

Below is my following code :

Service.h code:

class Service{
protected:
	char	servType[100];
	vector<Medicine> vecMedicine; // the purpose that i created a vector attribute is a service can have many medicine
	vector<vector<char> > vecDosage; 
public:
	static int servNo;
public:
	Service() 
	{
		servNo++;
	}
	
	//set
	void setServType(string newServType) { strcpy(servType, newServType.c_str()); }
	void setMedicine(Medicine newMedicine) { vecMedicine.push_back(newMedicine); }
	void setDosage(vector<char> newVecDosage) { vecDosage.push_back(newVecDosage); }

	//get
	string getServType() { return servType; }
	vector<Medicine> getMedicine() { return vecMedicine; }
	vector<vector<char> > getDosage() { return vecDosage; }

	virtual double getServiceCharge() { return 0; }

Regular.h code:

#define REGULAR_CHARGE 50;

class Regular : public Service{
public:
	Regular() { strcpy(servType,"Regular"); }

	double getServiceCharge() { return REGULAR_CHARGE; }
};

serviceDAO.h code:

#define SERVICE_FILE "db/service.txt"

class ServiceDAO{
public:
	ServiceDAO() { }	
	void saveFile(vector<Service*>& newVecService)
	{
		int i = 0;
		fstream file;

		file.open(SERVICE_FILE,ios::out|ios::trunc|ios::binary);
		
		for(i=0; i < newVecService.size(); i++)
		{
			if(newVecService[i] != NULL)
			{
				file.write((char*)newVecService[i], sizeof(*newVecService[i]));
			}
		}
	}

	vector<Service*>& readFile(vector<Service*>& newVecService, Service *newServ)
	{
		int i = 1;
		newServ = new Service; // allocate memory for the read function  
		fstream file;

		--Service::servNo;
		file.open(SERVICE_FILE,ios::in|ios::binary);

		if(file.is_open())
		{
			while(file.read((char*)newServ, sizeof(*newServ)))
			{
				newVecService[i] = newServ;
				newServ = new Service; // allocate memory for the read function  
				if(newVecService[i] != NULL)
				{
					Service::servNo = i;
				}
				++i;
			}
			delete newServ;
			newServ = 0;
		}
		return newVecService;
	}
};

Main.cpp code:

static const int MAXIMUM_RECORDS = 300;
int Service::servNo = 0;

vector<Medicine> vecMedicine;

Service *newServ = 0;
ServiceDAO servDAO;
vector<Service*> vecService;

void main()
{
	vecService.assign(MAXIMUM_RECORDS, newServ);
	vecService = servDAO.readFile(vecService, newServ);
	do
	{
		// at here display the main menu
		// switch(choice)
		// case 1 goto addService();break;
		// case 2 goto searchService();break;
		// case 3 goto listService();break;
	}
	servDAO.saveFile(vecService);
}

void addService()
{
	newServ = new Regular();
	vecService[Service::servNo] = newServ;
	// back to main menu
}

void searchService()
{
	newServ = new Regular();
	
	// enter a valid medicine input
	vecService[x]->setMedicine(vecMedicine[iPosMed]);
	
	// enter a valid dosage input
	// pusback the value into tempVec
	vector<char> tempVec;
	vecService[pos]->setDosage(tempVec);

	// back to main menu
}

void listService()
{
	system("cls");
	int x;
	int z = 0;
	int iMed = 0;
	string temp;
	gotoxy(0,8);cout << "No.";
	gotoxy(5,8);cout << "Type ";
	gotoxy(55,8);cout << "Medicine(s)";
	gotoxy(0,9);cout << "-------------------------------------------------------------------------------";
	for (x=1;x<vecService.size();x++)
	{
		if(vecService[x] != NULL)
		{
			gotoxy(0,9+x+z);cout << x;
			gotoxy(5,9+x+z);cout << vecService[x]->getServType().c_str();
			if(vecService[x]->getMedicine().size() != 0)
			{
				for(iMed = 0; iMed < vecService[x]->getMedicine().size(); iMed++)
				{
					if(iMed == 0)
					{
						temp = vecService[x]->getMedicine()[iMed].getMedName();
					}
					else
					{
						temp += ", " + vecService[x]->getMedicine()[iMed].getMedName();
					}
					gotoxy(55,9+x+z);cout << temp.c_str(); 
				}
			}
			else
			{
				gotoxy(55,9+x+z);cout << "<<empty>>";
			}
			
		}
		else
		{
			--z;
		}
	}
}

hope all guru can help me solve my problem..

Thanks in advance..