Airline Reservation System (argc/argv and parsing data)

[programming girl]

Having trouble with argc/argv and parsing the data in my "void GetFlightData" function. Any help appreciated!

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
using namespace std;

class ReservationRecords
{
private:
	struct Flights
	{
		string FlightNumber;
		int TotalSeats;
		int TakenSeats;
	};

	struct Record
	{
		string Name;
		string PhoneNumber;
		string FlightNumber;
		string DateOfTravel;
	};

	vector<Flights> FlightList;
	vector<Record> RecordList;

public:

	// add all info into flightlist
	void GetFlightData(string filename) {
		// string filename;
		// cout << "Reservations>> ";
		// cin >> filename;
		ifstream inputfile (filename); // ifstream = stream class to read from files
		if (inputfile.is_open())
			cout << "Flight numbers and seat availability uploaded\n";
		else
			cout << "ERROR: cannot open input file.\n";

		// reading in flight number and seat capacity from "filename"
		string FilenameFlightNumber;
		int FilenameTotalSeats;

		while (!inputfile.eof()) {// While not at end of inputfile
			inputfile >> FilenameFlightNumber;
			inputfile >> FilenameTotalSeats;

			Flights AddToList;
			AddToList.FlightNumber = FilenameFlightNumber;
			AddToList.TotalSeats = FilenameTotalSeats;
			FlightList.push_back(AddToList);
			};
	};

	void NewFlight(string NewFlightNumber, int NewFlightTotalSeats) {
		for(int i =0; i<FlightList.size(); i++)
		{
			if(NewFlightNumber.compare(FlightList[i].FlightNumber)) // compare compares if equal
			{
				cout << "A flight numbered " << NewFlightNumber << " already exists. Flight not created.\n";
				return;
			}
		}
			Flights AddToList;
			AddToList.FlightNumber = NewFlightNumber;
			AddToList.TotalSeats = NewFlightTotalSeats;
			FlightList.push_back(AddToList);
	};

	void add(string AddName, string AddPhoneNumber, string AddFlightNumber, string AddDate) {
		// go through passenger list to check name and make sure reservation does not exist

		// go through flight and when find flight list check if seats are available. If nothing found, print "no flight exists"

		// otherwise, add object to passenger list
		for(int i=0; i<RecordList.size(); i++)
		{
			if(AddName.compare(RecordList[i].Name) && AddFlightNumber.compare(RecordList[i].FlightNumber) && AddDate.compare(RecordList[i].DateOfTravel))
			{
				cout << "This reservation already exists.\n";
				return;
			}
			else if(AddFlightNumber.compare(RecordList[i].FlightNumber))
			{	// we found the flight
				// check if seats are available
				int j;
				for (j = 0; j < FlightList.size(); j++)
					if (RecordList[i].FlightNumber == FlightList[j].FlightNumber)
						if (FlightList[j].TotalSeats == FlightList[j].TakenSeats)
						{
							cout << "No seat available.\n";
							return;
						}
		
				// seats are available and we can the record
				Record AddToList;
				AddToList.Name = AddName;
				AddToList.PhoneNumber = AddPhoneNumber;
				AddToList.FlightNumber = AddFlightNumber;
				AddToList.DateOfTravel = AddDate;
				RecordList.push_back(AddToList);
				FlightList[j].TakenSeats++;
				return;
			}
		}
		// exit the loop
		// we have not found a flight number
		cout << "No flight numbered " << AddFlightNumber << " exists.\n";
	};

	// Delete record and subtract 1 from taken seats of that specific flight number.
	// If record.name does not exist, print "This reservation does not exist."
	// delete <name> from <flight-number> on <date>
	void Delete(string DeleteName, string DeleteFlightNumber, string DeleteDate) {
		for(int i=0; i<RecordList.size(); i++)
		{
			if(DeleteName.compare(RecordList[i].Name) && DeleteFlightNumber.compare(RecordList[i].FlightNumber) && DeleteDate.compare(RecordList[i].DateOfTravel))
			{
				// Delete record [i] and subtract 1 from Flights.TakenSeats
				RecordList[i].Name = "";
				RecordList[i].FlightNumber = "";
				RecordList[i].DateOfTravel = "";
				FlightList[i].TakenSeats--;
				return;
			}
		}
		cout << "This reservation does not exist\n";
	};

	// is <name> in <flight-number> on <date>?
	void IsNameInFlightOnDate(string IsNameInFlightOnDateName, string IsNameInFlightOnDateFlightNumber, string IsNameInFlightOnDateDate) {
			for(int i=0; i<RecordList.size(); i++)
		{
			if(IsNameInFlightOnDateName.compare(RecordList[i].Name) && IsNameInFlightOnDateFlightNumber.compare(RecordList[i].FlightNumber) && IsNameInFlightOnDateDate.compare(RecordList[i].DateOfTravel))
			{
				cout << "Yes\n";
				return;
			}
		}
		cout << "No\n";
	};

	// lookup <name>
	void Lookup(string LookupName) {
		int counter = 0;
		for(int i=0; i<RecordList.size(); i++)
		{
			if(LookupName.compare(RecordList[i].Name))
			{
				counter++;
				cout << counter << ". (" << LookupName << ", " << RecordList[i].PhoneNumber << ", " << RecordList[i].FlightNumber << ", " << RecordList[i].DateOfTravel << ")\n";
			}
		}
		if (counter == 0)
			cout << "No reservation exists for " << LookupName << ".\n";
	};

	// display <flight-number> on <date>
	void Display(string DisplayFlightNumber, string DisplayDate) {
			int counter = 0;
			for(int i=0; i<RecordList.size(); i++)
		{
			if(DisplayFlightNumber.compare(RecordList[i].FlightNumber) && DisplayDate.compare(RecordList[i].DateOfTravel))
			{
				counter++;
				cout << counter << ". (" << RecordList[i].Name << ", " << RecordList[i].PhoneNumber << ", " << RecordList[i].FlightNumber << ", " << RecordList[i].DateOfTravel << ")\n";
			}
		}
		if (counter == 0)
			cout << "No flight numbered " << DisplayFlightNumber << " exists.\n";
	};
};

// argc gives total # of command line arguments entered by user, including program name. redtxt output.txt returns 2.
// argv is an array of strings that contains all arguments on the command line, starting with the program name.
// In this ex, argv[0] points to readtxt, and argv[1] points to output.txt
int main(int argc, char *argv[])
{
	ReservationRecords R;
	string filename = argv[1];

	// call build flight list
	R.GetFlightData(filename);

	string str1, str2, str3, str4, str5;

	while(1)
	{
		cin >> str1;
		if (str1.compare("new"))
		{
			int s;
			cin >> str2;
			if (str2.compare("flight"))
			{
				cin >> str3;
				cin	>> s;
			}
		
			R.NewFlight(str3, s);
		}
	
		else if (str1.compare("quit"))
			return 0;

		else if (str1.compare("add"))
		{
			cin >> str2;
			cin >> str3;
			cin >> str4;
			cin >> str5;

			R.add(str2, str3, str4, str5);
		}

		else if (str1.compare("delete"))
		{
			cin >> str2;
			cin >> str3;
			cin >> str3;
			cin >> str4;
			cin >> str4;

			R.Delete(str2, str3, str4);
		}

		else if (str1.compare("is"))
		{
			cin >> str2;
			cin >> str3;
			cin >> str3;
			cin >> str4;
			cin >> str4;

			R.IsNameInFlightOnDate(str2, str3, str4);
		}

		else if (str1.compare("lookup"))
		{
			cin >> str2;
			R.Lookup(str2);
		}
	
		else if (str1.compare("display"))
		{
			cin >> str2;
			cin >> str3;
			cin >> str3;
			R.Display(str2, str3);
		}

		else cout << "\n\nInvalid input\n\n";
	}
};