C++

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eof() ?

OnymousIllusion (82)
I can't really figure out why I need to use eof() with files... I keep reading on it in my book for college but its just not doing it for me any help would be appreciated.
Disch (13742)
eof lets you know if you've reached the end of the file.

Without it, how would you know when to stop reading data from the file?

Or what if the file was shorter than you expected?
OnymousIllusion (82)
But where would I use it in this program that I made?

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#include <iostream>
#include <fstream>

using namespace std;

int main( ) {

  char c;
  int userPick;
  int userFilePick;

  ifstream outFile;

  cout << "1: Lamb of god" << endl;
  cout << "2: Six feet under" << endl;
  cout << "3: Pantera" << endl;
  cout << "4: Slayer" << endl;
  cout << "> ";
  cin >> userPick;

  cout << endl;

  switch( userPick )
  {

      case 1:

            cout << "1: Ashes Of The Wake" << endl;
            cout << "> ";
            cin >> userFilePick;

            if( userFilePick == 1 )
            {
              outFile.open( "AshesOfTheWake.txt" );

              while( outFile.good( ) )
              {
                c = outFile.get( );

                if( outFile.good( ) )
                  cout << c;
              }
            }
        break;

       case 2:

            cout << "1: the day the dead walks " << endl;
            cout << "> ";
            cin >> userFilePick;

            if( userFilePick == 1 )
            {
              outFile.open( "TheDayTheDeadWalks.txt" );

              while( outFile.good( ) )
              {
                c = outFile.get( );

                if( outFile.good( ) )
                  cout << c;
              }
            }
         break;

        case 3:

            cout << "1: cowboys from hell " << endl;
            cout << "> ";
            cin >> userFilePick;

            if( userFilePick == 1 )
            {
              outFile.open( "CowboysFromHell.txt" );

              while( outFile.good( ) )
              {
                c = outFile.get( );

                if( outFile.good( ) )
                  cout << c;
              }
            }

        case 4:

            cout << "1: Disciple " << endl;
            cout << "> ";
            cin >> userFilePick;

            if( userFilePick == 1 )
            {
              outFile.open( "Disciple.txt" );

              while( outFile.good( ) )
              {
                c = outFile.get( );

                if( outFile.good( ) )
                  cout << c;
              }
            }


        default:

            cout << "Not an option: \n";
            break;
  }

  outFile.close( );

  return 0;
}
Disch (13742)
You don't really need to because you're already using good() which checks for EOF as well as other things.
OnymousIllusion (82)
So is good better to use then EOF?
Duthomhas (13206)
Always loop using good(). Once the file is no longer good(), then you should check to see whether it failed due to eof() or something else. This avoids infinite loops.

BTW, why did you name an input stream "outFile"?
OnymousIllusion (82)
A mistake, and thanks for the help
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