hotelbooking.cpp

本人在学习C＋＋阶段

	{		cout << "\n\n\tCould not open Booking.dat file.";
			return;
	}

	// Check whether the booking is for a hotel or a resort.

	check='n';
	while(check=='n')
	{
		cout << "\nBooking for Hotel or Resort? (H/R): ";
		cin >> book_type;

		if(book_type=='h')
			book_type='H';
		else if(book_type=='r')
			book_type='R';

		if(book_type != 'H' && book_type != 'R')
			cout << "\n\n\tPLEASE ENTER 'H' FOR HOTEL OR 'R' FOR RESORT BOOKING";
		else
			check='y';
	}

	if(book_type == 'H') // If the booking is for a hotel...
	{
		// Declare an object array of the hotel class.

		hotel hotelarr[100];

		// Open Hotel.dat file for reading.

		finout1.open("Hotel.dat", ios::in);
		if(!finout1)
		{		cout << "\n\n\tCould not open Hotel.dat file.";
				return;
		}

		// Read the hotel records into the object array.

		for(i=0;(finout1.read((char *)&hotelarr[i], sizeof(hotelarr[i])));i++) {}

		// Accept a valid hotel code.

		check='n';
		while(check=='n')
		{
			cout << "\nEnter Hotel code: ";
			cin >> hcd1;

			for(j=0;j<i;j++) 
			{	
				// Obtain the hotel code of each object.

				hcd2=hotelarr[j].getcode();
				
				// Check whether it matches the input hotel code.

				if(hcd1==hcd2)
				{
					check='y';
					break;
				}
			}

			if(check=='n')
				cout << "\n\n\tINVALID HOTEL CODE! Please re-enter.";
		}

		// Accept a valid room type.

		check='n';
		while(check=='n')
		{
			cout << "\nEnter required room type('R' for regular, 'D' for Deluxe): ";
			cin >> rtype;
			cin.ignore();

			if(rtype=='r')
				rtype='R';
			else if(rtype=='d')
				rtype='D';

			if(rtype != 'R' && rtype != 'D')
				cout << "\n\n\tPLEASE ENTER 'R' FOR REGULAR OR 'D' FOR DELUXE";
			else
				check='y';
		}

		// Obtain the number of rooms available for the specified room type.

		if(rtype=='R')
			vavail=hotelarr[j].getregno();
		else
			vavail=hotelarr[j].getdlxno();

		if(vavail==0) // If rooms are not available, return to menu.
		{
			cout << "\n\n\tNo rooms available. Press enter to return to menu.";
			cin >> check;
			return;
		}
		
		/* If rooms are available, accept the booking and invoke functions 
			to reduce the available number. */
		else 
		{
			if(rtype=='R')
				hotelarr[j].reducereg();
			else
				hotelarr[j].reducedlx();
		}

		// Close the Hotel.dat file.

		finout1.close();

		/* Reopen Hotel.dat in write mode to write the updated 
			object array back to the file. */

		finout1.open("Hotel.dat", ios::out);
		if(!finout1)
		{		cout << "Could not open Hotel.dat file for updating.";
				return;
		}
	
		// Write the object array back to the file.

		for(j=0;j<i;j++)
			finout1.write((char *)&hotelarr[j], sizeof(hotelarr[j]));

		// Close the Hotel.dat file.

		finout1.close();
	}
	else // If the booking is for a resort...
	{
		// Declare an object array of the resort class.

		resort resortarr[100];
	
		// Open Resort.dat file for reading.

		finout1.open("Resort.dat", ios::in);
		if(!finout1)
		{		cout << "\n\n\tCould not open Resort.dat file.";
				return;
		}

		// Read the resort records into the object array.

		for(i=0;(finout1.read((char *)&resortarr[i], sizeof(resortarr[i])));i++) {}

		// Accept a valid resort code.

		check='n';
		while(check=='n')
		{
			cout << "\nEnter Resort code: ";
			cin >> hcd1;
			cin.ignore();

			for(j=0;j<i;j++) 
			{	
				// Obtain the resort code of each object.

				hcd2=resortarr[j].getcode();
				
				// Check whether it matches the input resort code.

				if(hcd1==hcd2)
				{
					check='y';
					break;
				}
			}

			if(check=='n')
				cout << "\n\n\tINVALID RESORT CODE! Please re-enter.";
		}

		// Set the room type to 'C' for cottage.

		rtype='C';

		// Obtain the number of cottages available.

		vavail=resortarr[j].getcottno();

		if(vavail==0) // If cottages are not available, return to menu.
		{
			cout << "\n\n\tNo cottages available. Press M and Enter keys to return to menu.";
			cin >> check;
			return;
		}
		
		/* If cottages are available, accept the booking and invoke 
			function to reduce the available number. */
		else
			resortarr[j].reducecott();

		// Close the Resort.dat file.

		finout1.close();

		/* Reopen Resort.dat in write mode to write the updated 
			object array back to the file. */

		finout1.open("Resort.dat", ios::out);
		if(!finout1)
		{		cout << "Could not open Resort.dat file for updating.";
				return;
		}
	
		// Write the object array back to the file.

		for(j=0;j<i;j++)
			finout1.write((char *)&resortarr[j], sizeof(resortarr[j]));

		// Close the Resort.dat file.

		finout1.close();
	}

	// Obtain the booking number of the last booking in the file.

	finout.seekg(0);
	while(finout.read((char *)&booking1, sizeof(booking1))){}
	lastnum=booking1.getnum();
	
	/* If the details of the first booking are being entered, 
		set last booking number to 0.*/

	if(lastnum<0)
		lastnum=0;
	
	// Close the Booking.dat file.
	
	finout.close();

	/* Invoke the function to accept booking details and pass the last 
		booking number, hotel type, hotel code and room type as 
		parameters to it. */

	booking2.getdata(lastnum, book_type, hcd1, rtype);

	// Reopen Booking.dat file for adding the new record.

	finout.open("Booking.dat", ios::app);
	if(!finout)
	{	cout << "Could not open Booking.dat file.";
		return;
	}

	// Write the new record to the Booking.dat file.

	finout.write((char *)&booking2, sizeof(booking2));

	// Close the Booking.dat file.
	
	finout.close();
	return;
}



/* Function to record cancellations. */

void rec_cancel(void)
{
	// Declare an object array of the booking class.

	booking bookingarr[100];
	int i, j, bno1, bno2, hcd;
	char check, htype, rtype;

	// Open Booking.dat for reading.

	fstream finout("Booking.dat", ios::in);
	if(!finout)
	{	cout << "Could not open Booking.dat file for reading.";
		return;
	}

	// Read the file contents into the object array.

	for(i=0;(finout.read((char *)&bookingarr[i], sizeof(bookingarr[i])));i++) {}
	
	system("cls");
	cout << "\nRECORD CANCELLATION DETAILS\n";
	
	// Accept a valid booking number.

	check='n';
	while(check=='n')
	{
		cout << "\nEnter Booking number: ";
		cin >> bno1;

		for(j=0;j<i;j++)
		{	
			// Obtain the booking number of each object.

			bno2=bookingarr[j].getnum();
			
			// Check whether it matches the input booking number.

			if(bno1==bno2)
			{
				// If found, obtain the hotel type, code and room type.

				htype=bookingarr[j].gethoteltype();
				hcd=bookingarr[j].gethotelcd();
				rtype=bookingarr[j].getroomtype();
				check='y';
				break;
			}
		}

		if(check=='n')
			cout << "\n\n\tINVALID BOOKING NUMBER! Please re-enter.";
	}

	// Close the Booking.dat file.

	finout.close();
	
	// Open Booking.dat file for writing.

	finout.open("Booking.dat", ios::out);
	if(!finout)
	{	cout << "Could not open Booking.dat file for writing.";
		return;
	}

	/* Write the contents of the object array into the file, 
		excluding the record for the booking to be cancelled. */

	for(j=0;j<i;j++)
	{	
		bno2=bookingarr[j].getnum();

		if(bno1!=bno2)
			finout.write((char *)&bookingarr[j], sizeof(bookingarr[j]));
	}

	// Close the Booking.dat file.

	finout.close();
	
	if(htype=='H') // If the cancelled booking was for a hotel...
	{
		// Declare an object array of the hotel class.

		hotel hotelarr[100];
		int hotelcd;

		// Open Hotel.dat file for reading.

		fstream finout1("Hotel.dat", ios::in);
		if(!finout1)
		{		cout << "\n\n\tCould not open Hotel.dat file.";
				return;
		}

		// Read the hotel records into the object array.

		for(i=0;(finout1.read((char *)&hotelarr[i], sizeof(hotelarr[i])));i++) 
		{
			hotelcd=hotelarr[i].getcode();

			/* If the object's hotel code matches the cancelled 
				booking hotel code, invoke function to increase 
				the room availability. */

			if(hotelcd==hcd) 
			{
				if(rtype=='R')
					hotelarr[i].increasereg();
				else
					hotelarr[i].increasedlx();
			}
		}

		// Close the Hotel.dat file.

		finout1.close();

		// Open the Hotel.dat file for writing.

		finout1.open("Hotel.dat", ios::out);
		if(!finout1)
		{		cout << "Could not open Hotel.dat file for updating.";
				return;
		}
	
		// Write the object array back to the file.

		for(j=0;j<i;j++)
			finout1.write((char *)&hotelarr[j], sizeof(hotelarr[j]));

		// Close the Hotel.dat file.

		finout1.close();
	}
	else // If the cancelled booking was for a resort...
	{
		// Declare an object array of the resort class.

		resort resortarr[100];
		int resortcd;

		// Open Resort.dat file for reading.

		fstream finout1("Resort.dat", ios::in);
		if(!finout1)
		{		cout << "\n\n\tCould not open Resort.dat file.";
				return;
		}

		// Read the resort records into the object array.

		for(i=0;(finout1.read((char *)&resortarr[i], sizeof(resortarr[i])));i++) 
		{

			/* If the object's resort code matches the cancelled 
				booking resort code, invoke function to increase 
				the cottage availability. */

			resortcd=resortarr[i].getcode();
			if(resortcd==hcd)
					resortarr[i].increasecott();
		}

		// Close the Resort.dat file.

		finout1.close();

		// Open the Resort.dat file for writing.

		finout1.open("Resort.dat", ios::out);
		if(!finout1)
		{		cout << "Could not open Resort.dat file for updating.";
				return;
		}
	
		// Write the object array back to the file.

		for(j=0;j<i;j++)
			finout1.write((char *)&resortarr[j], sizeof(resortarr[j]));

		// Close the Resort.dat file.

		finout1.close();
	}

	cout << "\n\n\tBooking has been cancelled. Press M and Enter keys to return to menu.";
	cin >> check;
}



/* Function to display the hotels and resorts in a specified city. */

void viewhotel(void)
{
	// Declare objects for the hotel and resort class.

	hotel vhotel;
	resort vresort;
	
	fstream finout1, finout2;
	int foundctr, i;
	char vcitynm[30], *pcitynm, check;

	// Open the Hotel.dat file for reading.

	finout1.open("Hotel.dat", ios::in);
	if(!finout1)
	{		cout << "Could not open Hotel.dat file for reading.";
			return;
	}

	// Open the Resort.dat file for reading.

	finout2.open("Resort.dat", ios::in);
	if(!finout2)
	{		cout << "Could not open Resort.dat file for reading.";
			return;
	}

	system("cls");
	cout << "\nVIEW HOTELS AND RESORTS IN A CITY";

	// Accept the city name.

	cout << "\n\nEnter the city name: ";
	cin.getline(vcitynm, 30);

	cout << "\n\nLIST OF HOTELS\n";

	foundctr=0;

	// Loop to display the hotels in the specified city.

	for(i=0;(finout1.read((char *)&vhotel, sizeof(vhotel)));i++) 
	{
		pcitynm=vhotel.getcitynm();
		if((strcmp(vcitynm, pcitynm))==0)
		{	vhotel.dispdata();
			foundctr=1;
		}
	}

	if(foundctr!=1)
		cout << "\n\tThere are no hotels in the specified city.";

	cout << "\n\n\nLIST OF RESORTS\n";

	foundctr=0;

	// Loop to display the resorts in the specified city.

	for(i=0;(finout2.read((char *)&vresort, sizeof(vresort)));i++) 
	{
		pcitynm=vresort.getcitynm();
		if((strcmp(vcitynm, pcitynm))==0)
		{	vresort.dispdata();
			foundctr=1;
		}
	}

	if(foundctr!=1)
		cout << "\n\tThere are no resorts in the specified city.";

	// Close the files

	finout1.close();
	finout2.close();

	cout << "\n\n\tPress M and Enter keys to return to menu.";
	cin >> check;
}