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#include <iostream>
#include <cstring>
#include <fstream>
#include <cstdlib>
using namespace std;
bool LoadFile(char[], int&); // takes the filename to open - returns bool
void AddSubscriber(int&, char[] );
void DeleteSubscriber();
void ChangeExpDate();
void ChangeAddress();
void PrintSubscriber();
void PrintExpired();
void SaveFile(char[], int&); // takes a filename as an argument
void PrintMenu(); // print menu function
const int MAX = 100;
const int FMAX = 32;
struct subscriber
{
char firstname [MAX];
char lastname [MAX];
char street [MAX];
char city [MAX];
char state [MAX];
int postcode;
int sub_expmonth;
int sub_expyear;
};
int main()
{
char command;
char Filename[FMAX];
subscriber collection[MAX]; // collection of subscriber records
int tally; // you might need to introduce another variable - can you think why?
cout << "Enter a filename to load database: ";
cin >> Filename;
LoadFile(Filename, tally);
PrintMenu();
do
{
cout << "\nCommand:" << endl;
cin >> command;
switch (command)
{
case 'A':
AddSubscriber(tally ,collection); // YOU WILL NEED TO CHANGE THE CALL
break;
/*case 'D':
DeleteSubscriber( &collection, &tally ); // YOU WILL NEED TO CHANGE THE CALL
break;
case 'C':
ChangeExpDate( &collection, &tally ); // YOU WILL NEED TO CHANGE THE CALL
break;
case 'R':
ChangeAddress( &collection, &tally ); // YOU WILL NEED TO CHANGE THE CALL
break;
case 'P':
PrintSubscriber( &collection, &tally ); // YOU WILL NEED TO CHANGE THE CALL
break;
case 'E':
PrintExpired( &collection, &tally ); // YOU WILL NEED TO CHANGE THE CALL
break;*/
case 'S':
SaveFile( Filename, tally); // YOU WILL NEED TO CHANGE THE CALL
break;
case 'Q':
break;
default:
cerr << "Illegal Command\n";
}
if (command != 'Q') // don't output menu if quiting
PrintMenu();
} while (command != 'Q');
return 0;
}
void PrintMenu()
{
cout << "Commands Available:\n\n";
cout << " A - add a new subscriber\n";
cout << " C - change expiry date for a specified subscriber\n";
cout << " D - delete a subscriber\n";
cout << " R - change address for a specified subscriber\n";
cout << " P - print a specified subscriber\n";
cout << " E - print subscribers that have expired\n";
cout << " S - save the in memory records back to the file\n";
cout << " Q - terminate the program" << endl;
}
bool LoadFile (char Filename [FMAX], int &tally)
{
subscriber collection [MAX];
Filename = { Filename };
ifstream saucy;
saucy.open ( Filename, ios::in );
if ( saucy.fail() )
{
cout << "The file " << Filename << " has failed to open." << endl;
cout << "A new, blank database has been automatically created using the inputted name.\n" << endl;
ofstream saucy;
saucy.open ( Filename, ios::out ); //Creates file under inputted name
saucy << "0" << '\n'; //Writes record count (0 at the moment) to first line, ready for use
saucy.close();
return false;
}
else if ( saucy.good() )
{
cout << "The file " << Filename << " loaded successfully." << endl;
saucy >> tally, '\n'; //Reads first line of file which provides the record count
cout << tally << " records have been read into memory.\n" << endl;
for( int i = 0; i < tally; i ++ )
{
saucy >> collection[i].firstname;
saucy >> collection[i].lastname;
saucy >> collection[i].street;
saucy >> collection[i].city;
saucy >> collection[i].state;
saucy >> collection[i].postcode;
saucy >> collection[i].sub_expmonth;
saucy >> collection[i].sub_expyear;
}
for(int i = 0; i < tally; i ++ )
{
cout << collection[i].firstname << endl;
cout << collection[i].lastname << endl;
cout << collection[i].street << endl;
cout << collection[i].city << endl;
cout << collection[i].state << endl;
cout << collection[i].postcode << endl;
cout << collection[i].sub_expmonth << endl;
cout << collection[i].sub_expyear << endl;
}
return true;
}
saucy.close();
}
void AddSubscriber(int &tally, subscriber &collection [MAX])
{
int tempcount,i;
tempcount = tally + 1;
cout << "Please enter the new subscribers first name - ";
cin >> collection[tempcount].firstname;
cout << "Please enter the new subscribers last name - ";
cin >> collection[tempcount].lastname;
cout << "Please enter the new subscribers street - ";
cin >> collection[tempcount].street;
cout << "Please enter the new subscribers city - ";
cin >> collection[tempcount].city;
cout << "Please enter the new subscribers state - ";
cin >> collection[tempcount].state;
cout << "Please enter the new subscribers postcode - ";
cin >> collection[tempcount].postcode;
cout << "Please enter the new subscribers subscription expiration month - ";
cin >> collection[tempcount].sub_expmonth;
cout << "Please enter the new subscribers subscription expiration year - ";
cin >> collection[tempcount].sub_expyear;
cout << "The new details have been taken into memory." << endl;
cout << "Please use the 'S' option from the menu to save this subscriber to the database." << endl;
tally++;
}
void SaveFile(char Filename [FMAX], int &tally)
{
int i = 1, j;
subscriber collection[MAX];
Filename = { Filename };
cout << "Major checkpoint - " << tally << endl;
ofstream saucy;
saucy.open ( Filename, ios::out );
saucy << tally, '\n';
for(i = 0; i < tally; i ++ )
{
saucy << collection[i].firstname;
saucy << collection[i].lastname;
saucy << collection[i].street;
saucy << collection[i].city;
saucy << collection[i].state;
saucy << collection[i].postcode;
saucy << collection[i].sub_expmonth;
saucy << collection[i].sub_expyear;
}
saucy.close();
}
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